5 research outputs found
VIGICOP: autonomous surveillance robots with Sodar detection and autonomous navigator
The main goal of the project described in this paper
is to create a security system using autonomous surveillance
robots that use SODAR-like detection system sensors,
working with acoustic signals in air environment and
navigation base on Geographic Information System and
Markov's models. The surveillance system based on SONAR
provides great information from the environment, even lets you
see behind objects (rebounds effects) whose manipulation
offers a great added value to surveillance The guide system
will implement in one hand a local navigation module directed
to avoid obstacles based on classical techniques and using
the new SODAR sensor. On the other hand a global
navigation module will be implemented using preset
trajectories and gradient techniques and an auto-location
system. One of the greatest challenges obtained is the
definition of the VIGICOPVar variable that defines, depending
on the environment and safety parameters, the probability of
intrusion. Surveillance experts of GRUPO NORTE
(multinational company with security expertise of more than 38
years) have worked In the definition and validation of the
model. The monitoring robots will be controlled in a centralized
way from an alarm center from where you can manage all
information relating to intrusion detected. VIGICOP is the low
cost surveillance robot which provides new/full information
interactive surveillance informatio
Optimization of a Biometric System Based on Acoustic Images
On the basis of an acoustic biometric system that captures 16 acoustic images of a person for 4 frequencies and 4 positions, a study was carried out to improve the performance of the system. On a first stage, an analysis to determine which images provide more information to the system was carried out showing that a set of 12 images allows the system to obtain results that are equivalent to using all of the 16 images. Finally, optimization techniques were used to obtain the set of weights associated with each acoustic image that maximizes the performance of the biometric system. These results improve significantly the performance of the preliminary system, while reducing the time of acquisition and computational burden, since the number of acoustic images was reduced
Olives and olive oil are sources of electrophilic fatty acid nitroalkenes
Extra virgin olive oil (EVOO) and olives, key sources of unsaturated fatty acids in the Mediterranean diet, provide health benefits to humans. Nitric oxide (•NO) and nitrite (NO2-)-dependent reactions of unsaturated fatty acids yield electrophilic nitroalkene derivatives (NO 2-FA) that manifest salutary pleiotropic cell signaling responses in mammals. Herein, the endogenous presence of NO2-FA in both EVOO and fresh olives was demonstrated by mass spectrometry. The electrophilic nature of these species was affirmed by the detection of significant levels of protein cysteine adducts of nitro-oleic acid (NO2-OA-cysteine) in fresh olives, especially in the peel. Further nitration of EVOO by NO2- under acidic gastric digestive conditions revealed that human consumption of olive lipids will produce additional nitro-conjugated linoleic acid (NO2-cLA) and nitro-oleic acid (NO2-OA). The presence of free and protein-adducted NO2-FA in both mammalian and plant lipids further affirm a role for these species as signaling mediators. Since NO2-FA instigate adaptive anti-inflammatory gene expression and metabolic responses, these redox-derived metabolites may contribute to the cardiovascular benefits associated with the Mediterranean diet. © 2014 Fazzari et al