Lía García-Pérez

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Present work deals with the automation of a low cost commercial lawnmower to perform unmanned precision agriculture tasks such are the spraying of pesticides. To this aim the vehicle has been endowed with a set of additional subsystems and sensors to perform remote motion control and to obtain relative and absolute location in the field. The equipment(More)
In the autonomous piloting of vehicles, the characterization of nearby dynamic object motion by perception and tracking techniques aids in the optimization of avoidance strategies. Knowledge of the features of object motion in goal-driven navigation allows for accurate deviation strategies to be implemented with appropriate anticipation. This perceptual(More)
This paper describes experiments in which cytosolic Ca2+ concentrations ([Ca2+]i) and catecholamine release were measured in two populations of chromaffin cells stimulated with a solution enriched in K+ (100 mM). Once depolarized, external Ca2+ or Ba2+ ions were offered to cells either as a single 2.5 mM step or as a ramp that linearly increased the(More)
Fast superfusion of electroporated bovine adrenal chromaffin cells with a K+ glutamate-based solution containing 50 nM free Ca2+ and 2 mM adenosine 5'-triphosphate, dipotassium salt (K2ATP), produced a steady-state low catecholamine secretion, measured on-line with an electrochemical detector (about 20 nA). Rapid switching to electroporation solutions(More)
Present work describes the design and implementation of a fuzzy controller for a pneumatic actuator to control the steering of an unmanned lawnmower. The fuzzy controller expresses in natural language the human expertise on the control of this non-linear system by means of a set of linguistic expressions. Few investigations have been addressed to the(More)
Current work deals with the design and development of a virtual environment to test perception based navigation strategies for a non-holonomic real robot. Physical sensors onboard the robot are described with their main characteristics as virtual perceptual agents. Real environments are represented as polygons to closely mimic geometric shape properties of(More)
One of the main tasks in precision agriculture deals with partially or totally unsupervised pesticide treatment of crops plants. To obtain precise plant location, images are usually thresholded to quickly separate foreground or relevant structure from background. Location is required to properly activate an action (spray fertiliser, water or pesticide, make(More)
Current work deals with the design of a fuzzy reasoning system capable of selecting the most appropriate threshold to binarize a sequence of cauliflower crop images. Binary images speed up the processing time to detect the crops and calculate their position. The proposed threshold algorithm is based on a performance criterion, the emergence of a binary(More)
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