Papers by Alexis Quesada-Arencibia
Lecture Notes in Computer Science, 2022
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Lecture Notes in Computer Science, 2013
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Springer eBooks, 2012
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Universidad de Las Palmas de Gran Canaria eBooks, 2000
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Springer eBooks, 2013
In this paper we describe our proposal for humanoid robotic system to develop a football team tha... more In this paper we describe our proposal for humanoid robotic system to develop a football team that compete in the Robocup, describing hardware components used and software components developed.
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Health Informatics Journal, Sep 30, 2016
For this project, we have used new technologies to create a new channel of communication between ... more For this project, we have used new technologies to create a new channel of communication between doctors and patients in the treatment of mental disorders. We have created a web application using an adaptable design accessible from any mobile device, which allows doctors to adapt their patients’ therapy to real-time knowledge of their current condition. In turn, patients can express their mood state with respect to the component elements of their therapy.
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Lecture Notes in Computer Science, 2016
Mobility is a basic need for people, therefore the authorities in advanced societies pay special ... more Mobility is a basic need for people, therefore the authorities in advanced societies pay special attention to systems and initiatives that improve or facilitate it. In this work, a ubiquitous signaling system for visually impaired people, using a combination of WiFi and Bluetooth Low Energy (BLE) technology with Smart Mobile Devices, is proposed. The system is conceived as a solution to help and support these users in places of public road transportation with travellers massive transit, such as bus stations, interchangers or preferred stops. In addition, once the user is positioned in the desired location, the system would offer advanced services: information on lines schedules, tickets sale, etc.
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Sensors, 2019
Indoor positioning systems (IPS) are used to locate people or objects in environments where the g... more Indoor positioning systems (IPS) are used to locate people or objects in environments where the global positioning system (GPS) fails. The commitment to make bluetooth low energy (BLE) technology the leader in IPS and their applications is clear: Since 2009, the Bluetooth Special Interest Group (SIG) has released several improved versions. BLE offers many advantages for IPS, e.g., their emitters or beacons are easily deployable, have low power consumption, give a high positioning accuracy and can provide advanced services to users. Fingerprinting is a popular indoor positioning algorithm that is based on the received signal strength (RSS); however, its main drawbacks are that data collection is a time-consuming and labor-intensive process and its main challenge is that positioning accuracy is affected by various factors. The purpose of this work was to develop a semi-automatic data collection support system in a BLE fingerprinting-based IPS to: (1) Streamline and shorten the data co...
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ABSTRACT Georeferencing consists in establishing a relationship between information and geographi... more ABSTRACT Georeferencing consists in establishing a relationship between information and geographic locations, usually through geospatial referencing (i.e., longitude and latitude coordinates). Super-Resolution is a technique that enhances the spatial resolution of an imaging system. In this paper, the integration of both Georeferencing and Super-Resolution techniques is presented for video navigation in the web landscape applied to underwater videos.
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Systems Analysis Modelling Simulation, Sep 1, 2003
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Springer eBooks, 2005
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Computer Aided Systems Theory, 2020
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Springer eBooks, 2005
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Springer eBooks, Nov 1, 2005
... 199 Web Usage Mining Project for Improving Web-Based Learning Sites ME Zorrilla, E. Menasalva... more ... 199 Web Usage Mining Project for Improving Web-Based Learning Sites ME Zorrilla, E. Menasalvas, D. Marın, E. Mora, J ... 602 Improved Non-standard Discretization Methods for Nonlinear Dynamical Control Systems Jesus Rodrıguez-Millan, Carla Gonzalez, Anna Patete..... ...
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Lecture Notes in Computer Science, 2013
ABSTRACT This paper covers a new approach on Cloud Computing for Scientific Data Storage and Proc... more ABSTRACT This paper covers a new approach on Cloud Computing for Scientific Data Storage and Processing using a hybrid system with both on-site and on-the-cloud systems. The system analyzes use cases which are not resolved by either one of the single systems themselves.
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Lecture Notes in Computer Science, 2007
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Lecture Notes in Computer Science, 2001
In this paper we present a working vision system for estimating size, location and motion of an o... more In this paper we present a working vision system for estimating size, location and motion of an object by using a set of randomly distributed receptive fields on a retina. The approach used here differs from more conventional ones in which the receptive fields are arranged in a geometric pattern. From the input level, computations are performed in parallel in
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Springer eBooks, Nov 16, 2007
This work provides both a new global authentication system for Mobile Ad-hoc NETworks and a study... more This work provides both a new global authentication system for Mobile Ad-hoc NETworks and a study of its simulation with NS-2. The proposed scheme is constructed in a self-organizing manner, which implies the fulfillment of most requirements for this type of networks, such as adaptation to the changing topology of the network, public availability of broadcast communications and strength of access control.
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Lecture Notes in Computer Science, 2005
Motion is a key, basic descriptor of our visual experience of the outside world. The lack of moti... more Motion is a key, basic descriptor of our visual experience of the outside world. The lack of motion perception is a devastating illness that leads to death in animals and seriously impaired behavior in humans. Thus, the study of biological basis of motion detection and analysis and the modelling and artificial implementation of those mechanisms has been a fruitful path of science in the last 60 years. Along this paper, the authors make a review of the main models of motion perception that have emerged since the decade of the 60’s stress-ing the underlying biological concepts that have inspired most of them and the traditional architectural concepts imprinted in their functionality and design: formal mathematical analysis, strict geometric patterns of neuron-like processors, selectivity of stimulate etc. Traditional approaches are, then, questioned to include “messy” characteristics of real biological systems such as random distribution of neuron-like processors, non homogeneity of neural architecture, sudden failure of processing units and, in general, non deterministic behavior of the system. As a result is interesting to show that reliability of motion analysis, computational cost and extraction of pure geometrical visual descriptors (size and position of moving objects) besides motion are improved in an implemented model.
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Artificial Neural Nets and Genetic Algorithms, 1999
ABSTRACT Presynaptic Inhibition (PI) basically consists of the strong suppression of a neuron’s r... more ABSTRACT Presynaptic Inhibition (PI) basically consists of the strong suppression of a neuron’s response before the stimulus reaches the synaptic terminals mediated by a second, inhibitory, neuron. It has a long lasting effect, greatly potentiated by the action of anaesthetics, that has been observed in motorneurons and in several other places of nervous systems, mainly in sensory processing. In this paper we will focus on several different ways of modelling the effect of PI in the visual pathway as well as the different artificial counterparts derived from such modelling, mainly in two directions: the possibility of computing invariant representations against general changes in illumination of the input image impinging the retina (which is equivalent to a low-level non linear information processing filter) and the role of PI as selector of sets of stimulae that have to be derived to higher brain areas, which, in turn, is equivalent to a “higher-level filter” of information, in the sense of “filtering” the possible semantic content of the information that is allowed to reach later stages of processing.
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Papers by Alexis Quesada-Arencibia