ABSTRACT
When direct vision is obstructed, detecting an object usually involves either using mirrors or actively controlling some of the properties of light used for illumination. In our paradigm, we show that a highly scattering wall can transfer certain statistical properties of light, which, in turn, can assist in detecting objects even in non-line-of-sight conditions. We experimentally demonstrate that the transformation of spatial coherence during the reflection of light from a diffusing wall can be used to retrieve geometric information about objects hidden around a corner and assess their location. This sensing approach is completely passive, assumes no control over the source of light, and relies solely on natural broadband illumination.
ABSTRACT
Sixty home made wine and sixty-four grape samples were collected from five territories in Jordan, where grapes and wine are mostly producted. The collected samples were analyzed for the most used organochlorine pesticides (OCP) and organophosphorous pesticides (OPP) in Jordan, as well as for four heavy metals (Ni, Cu, Zn and Pb). The results showed that OCPs residues were detected in 73% of the wine samples but no OPPs residue were detected which is due to generally shorter half life of the later pesticide. Grapes showed higher incident of contamination than wine, however, OCPs and OPPs with both short and long half-lives were detected. The OPPs were detected in only 8.3% of the analyzed grape samples. Heavy metals showed higher values in grapes than in the wine samples and it was attributed to removal of solids during wine preparation processes or through contamination of wine during storage. Most of the samples were below toxic limit.
