Resultados de la búsqueda200 resultados
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Transferencia Universidad-Empresa-Ciudad. Tecnologías para el ciudadano
J. Javier Samper Zapater
(2019). Participació en congressosPrimer Simposio Internacional en Tendencias en Ingeniería de Sistemas y su Aplicación en las Empresas (TISA 2019).
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Modal Selectivity at 850 nm employing Standard Single-Mode Couplers: Theory and Experimental Demonstration
David Garcia-Rodriguez; Maria Morant; Juan L. Corral; Roberto Llorente
(2019). RevistaOptics Communications. Num.Volume 436, 1 April 2019, Pages 248-252
In this paper, we evaluate experimentally and analyze theoretically and by simulation the demultiplexing of LP01 and LP11 modes in a 850 nm few mode optical link when a standard single-mode coupler theoretically designed for 1550 nm operation is used. The simulation analysis indicates a feasible conversion efficiency higher than 98% for the LP01 mode and 100% efficiency for LP11 mode. These results are experimentally validated considering different off-the-shelf optical couplers configured in 99:1, 90:10, 80:20 and 60:40 coupling ratios. Experimental analysis of the optical couplers demonstrate adequate functionality in correspondence with the theoretical analysis, exhibiting a good...
In this paper, we evaluate experimentally and analyze theoretically and by simulation the demultiplexing of LP01 and LP11 modes in a 850 nm few mode optical link when a standard single-mode coupler theoretically designed for 1550 nm operation is used. The simulation analysis indicates a feasible conversion efficiency higher than 98% for the LP01 mode and 100% efficiency for LP11 mode. These results are experimentally validated considering different off-the-shelf optical couplers configured in 99:1, 90:10, 80:20 and 60:40 coupling ratios. Experimental analysis of the optical couplers demonstrate adequate functionality in correspondence with the theoretical analysis, exhibiting a good near-field pattern and modal profile for the LP01 and LP11 modes. The mode purity observed was 98.4% for the LP01 mode, and higher than 90% for the LP11 mode. The 90:10 optical coupler configuration shows best mode purity with the minimal insertion losses.
Leer más Ocultar DOI: https://doi.org/10.1016/j.optcom.2018.12.003 -
Evaluation of the use of a City Center through the use of Bluetooth Sensors Network
Juan José Martínez Durá; Francisco R. Soriano García; Javier Martínez Plume; Ramón V. Cirilo Gimeno; Antonio García Celda
(2019). ArticleSustainability. Num.Special Issue Smart Mobility for Future Cities
In order to achieve the objectives of Smart Cities, public administrations need to take measures to regulate mobility, which undoubtedly requires a high level of information and sensorization. Until the implementation of the connected vehicle takes place, it is still necessary to install sensors to obtain information about mobility. Bluetooth sensors are becoming a useful tool due to the low cost of equipment and installation. The use of Bluetooth sensors in cities, with short distances between sensors, makes it necessary to propose new classification algorithms that allow the trips of pedestrians and vehicles to be differentiated. This article presents the study carried out in the city of...
In order to achieve the objectives of Smart Cities, public administrations need to take measures to regulate mobility, which undoubtedly requires a high level of information and sensorization. Until the implementation of the connected vehicle takes place, it is still necessary to install sensors to obtain information about mobility. Bluetooth sensors are becoming a useful tool due to the low cost of equipment and installation. The use of Bluetooth sensors in cities, with short distances between sensors, makes it necessary to propose new classification algorithms that allow the trips of pedestrians and vehicles to be differentiated. This article presents the study carried out in the city of Valencia to determine the use of motor vehicles in the historic center and propose a new classification algorithm to distinguish between an onboard Bluetooth device and the same device carried by a pedestrian when it is not possible to use the travel time for the classification due to the short distance between sensors. This causes very similar or even indistinguishable travel times for vehicles and for pedestrians. We also propose an algorithm that allows vehicles to be classified according to what type of trip is made always through the historical center of Valencia, whether it is to make a shorter itinerary through the city or to access the center for any type of business. This algorithm would enable the Origin-Destination matrix of an urban network with short distances between sensors if they are available in all entries and exits. Likewise, the results obtained have allowed to positively evaluate the algorithm defined to distinguish between trips made by a pedestrian or a vehicle in a city, using the MAC address of their mobile devices with very short distances among sensors. The results of this study show that it is possible to use Bluetooth technology, with low cost installations, to evaluate the use of the city by motor vehicles.
Leer más Ocultar DOI: https://doi.org/10.3390/su11041002 -
Designing artificial intelligence. Challenges and strategies for achieving regulatory compliance
Ricard Martínez Martínez
(2019). RevistaRevista Catalana de Dret Públic. Num.2019 (58). 64-81
This article analyses the repercussions of artificial intelligence on law and fundamental rights. In the face of negative, reactive or catastrophist visions, it proposes an approach based on the regulatory compliance from the design inspired by the methodology of data protection from the design and by default.
DOI: https://doi.org/10.2436/rcdp.i58.2019.3317 -
The application of an information system in the e-government of Colombia to improve service to citizens
J. Javier Samper Zapater
(2019). Participació en congressosThe 6th International Conference on Advanced Engineering - Theory and Applications 2019 (AETA2019); Springer.
ISBN: 978-3-030-53020-4 -
SMART-ASD, model and ontology definition:a technology recommendation system for people with autism and/or intellectual disabilities
Javier Sevilla; J. Javier Samper; Gerardo Herrera; Marcos Fernández
(2018). ArticleInternational Journal of Metadata, Semantics and Ontologies. Num.Volum: 13 Número: 2 Pàgina inicial: 166 Pàgina final: 178
There are many studies that encourage the use of mobile device solutions to improve the skills of people with an Autism Spectrum Disorder (ASD). There are a number of apps that may be useful for people with ASD, some specifically designed for them, and others not. The main goal of the SMART-ASD project is to assist in the selection of adequate technology and all related accessories. In this project, the users' data are maintained into an ontology. This ontology also includes information about devices, apps, and protection. The system is a hybrid recommendation system that guides parents and professionals in the selection of the adequate technology. This paper presents the SMART-ASD model...
There are many studies that encourage the use of mobile device solutions to improve the skills of people with an Autism Spectrum Disorder (ASD). There are a number of apps that may be useful for people with ASD, some specifically designed for them, and others not. The main goal of the SMART-ASD project is to assist in the selection of adequate technology and all related accessories. In this project, the users' data are maintained into an ontology. This ontology also includes information about devices, apps, and protection. The system is a hybrid recommendation system that guides parents and professionals in the selection of the adequate technology. This paper presents the SMART-ASD model and its representation by reusing an ontology from related projects.
Leer más Ocultar ISSN: online 1744-263X / print 1744-2621 -
Special Section on ITS Services to Smart City Context [Guest Editorial]
Luis Felipe Herrera-Quintero ; Jose Javier Samper-Zapater ; Miroslav Svitek ; Walid David
(2018). ArticleIeee Intelligent Transportation Systems Magazine. Num.Volum: 10 Número: 2 Pàgina inicial: 4 Pàgina final: 5
The seven articles in this special section focus on new trends and developments in the intelligent transportation markets. Since the earliest of times, transportation has changed and revolutionized society and industry. Many of technology advances were focused on transportation and their means (road, rail, air, water, etc.) even, today there exist several areas of the knowledge that are focused on it. As time goes by, new terms have been established where technology is present as well, for instance, Intelligent Transportation Systems (ITS), Smart Cities, Smart Territory, Blockchain, Internet of Things, virtualization, Cloud computing, Intelligent Vehicles, embedded computing, Deep learning,...
The seven articles in this special section focus on new trends and developments in the intelligent transportation markets. Since the earliest of times, transportation has changed and revolutionized society and industry. Many of technology advances were focused on transportation and their means (road, rail, air, water, etc.) even, today there exist several areas of the knowledge that are focused on it. As time goes by, new terms have been established where technology is present as well, for instance, Intelligent Transportation Systems (ITS), Smart Cities, Smart Territory, Blockchain, Internet of Things, virtualization, Cloud computing, Intelligent Vehicles, embedded computing, Deep learning, etc. For that reason, with this special section in the ITS magazine, we want to continue showing new advances that will allow to people every day to find new services inside of the cities or even outsides of them, it means that, through the presented papers it will be possible to harmonized how the concepts in the digital world should be oriented in order to generate a best scenario to live.
Leer más Ocultar ISSN: 0957-4174 -
Distributed radio map reconstruction for 5G automotive
Vinay-Prasad Chowdappa; Carmen Botella Mascarell; José Javier Samper Zapater; Rafael Javier Martínez Durá
(2018). ArticleIeee Intelligent Transportation Systems Magazine. Num.Volum: 10 Número: 2 Pàgina inicial: 36 Pàgina final: 49
Radio maps are expected to be an essential tool for the resource optimization and management of 5G automotive. In this paper, we consider the problem of radio map reconstruction using a wireless sensor network formed by sensor nodes in vehicles, access nodes from a smart city infrastructure, etc. Due to limited resource constraints in sensor networks, it is crucial to select a small number of sensor measurements for field reconstruction. In this context, we present a novel distributed incremental clustering algorithm based on the regression Kriging method for radio map reconstruction in terms of average received power at locations where no sensor measurements are available. The path-loss...
Radio maps are expected to be an essential tool for the resource optimization and management of 5G automotive. In this paper, we consider the problem of radio map reconstruction using a wireless sensor network formed by sensor nodes in vehicles, access nodes from a smart city infrastructure, etc. Due to limited resource constraints in sensor networks, it is crucial to select a small number of sensor measurements for field reconstruction. In this context, we present a novel distributed incremental clustering algorithm based on the regression Kriging method for radio map reconstruction in terms of average received power at locations where no sensor measurements are available. The path-loss and shadowing components of the wireless channel are separately estimated. For shadowing estimation, clusters of sensors are adaptively formed and their size is optimized in terms of the least number of sensors by minimizing the ordinary Kriging variance. The complexity of the proposed algorithm is analyzed and simulation results are presented to showcase the algorithm efficacy to field reconstruction.
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Smart Mobility Trends: Open Data and Other Tools
Francisco R. Soriano ; J. Javier Samper-Zapater ; Juan Jose Martinez-Dura ; Ramon V. Cirilo-Gimeno ; Javier Martinez Plume
(2018). ArticleIeee Intelligent Transportation Systems Magazine. Num.Volumen: 10 Número: 2 Pàgina inicial: 6 Pàgina final: 16
The Strategic Implementation Plan for speeding up the transformation of European Cities into "Smart cities" establishes 6 Actions Clusters and 11 Priority Areas. Some of them are directly related to the transport and sustainable urban mobility. The main goal is the application of new technologies to minimize the loss of time and energy, and to improve the satisfaction of citizens. The use and reuse of information as open data, already collected from the Public Administration and private entities is a source of possibilities adding extra value. Technologies such as Bluetooth sensors, Open Data platforms etc., become essential elements to achieve this goal. This paper highlights the...
The Strategic Implementation Plan for speeding up the transformation of European Cities into "Smart cities" establishes 6 Actions Clusters and 11 Priority Areas. Some of them are directly related to the transport and sustainable urban mobility. The main goal is the application of new technologies to minimize the loss of time and energy, and to improve the satisfaction of citizens. The use and reuse of information as open data, already collected from the Public Administration and private entities is a source of possibilities adding extra value. Technologies such as Bluetooth sensors, Open Data platforms etc., become essential elements to achieve this goal. This paper highlights the opportunity to take advantage of emerging technologies, like the open source data platforms, or to use services for data linked queries. As an example of application of these technologies to the transport domain, several use cases with some results are presented.
Leer más Ocultar ISSN: 0957-4174 -
Robotica e Internet de las Cosas
J. Javier Samper Zapater
(2018). Participació en congressosIntercambio de experiencias internacionales. Num.Ponència Invitada àmbit Internacional
