This article focuses on techniques for position reconstruction of acoustic point sources with the AMADEUS setup consisting of 36 acoustic sensors in the Mediterranean Sea. The direction reconstruction of an acoustic point source utilizes the information of the 6 small-volume hydrophone clusters of AMADEUS individually. Source position reconstruction is then done by combining the directional inf...

Carbonate reservoirs are a highly heterogeneous type of reservoir characterized by the presence large amount vugs and pores. During two-phase displacement, flow regime in might be gravity segregated. The distribution pattern fluid would accelerate water downward horizontal directions, meanwhile decelerating an upward direction, resulting different oil recovery ratio. This gives rise to question...

Scale-discretised wavelets yield a directional wavelet framework on the sphere where a signal can be probed not only in scale and position but also in orientation. Furthermore, a signal can be synthesised from its wavelet coefficients exactly, in theory and practice (to machine precision). Scale-discretised wavelets are closely related to spherical needlets (both were developed independently at...

Mobile networks using directional antennas have many desirable properties such as Low Probability of Detection (LPD) and concentration of electromagnetic energy, resulting in improved range and data rates. To function properly, directional networks heavily depend on GPS use. This paper describes a decentralized algorithm, called “Fast RTSR”, for directional networking to re-construct time and p...

24 25 We showed that Folsomia candida (a blind soil-dwelling Collembola) was able to shift from 26 non-directional (random or search strategy) to directional (target-oriented) movements at short 27 distance of food. We measured departure from linearity and access (or not) to food by the springtail 28 according to distance to the target position. Video-records and image analysis were used to obt...