Search results for "Information System"
showing 10 items of 2404 documents
Solving the length constrained K-drones rural postman problem
2021
[EN] In this paper we address the Length Constrained K-Drones Rural Postman Problem (LC K-DRPP). This is a continuous optimization problem where a fleet of homogeneous drones have to jointly service (traverse) a set of (curved or straight) lines of a network. Unlike the vehicles in classical arc routing problems, a drone can enter a line through any of its points, service a portion of that line, exit through another of its points, then travel directly to any point on another line, and so on. Moreover, since the range of the drones is restricted, the length of each route is limited by a maximum distance. Some applications for drone arc routing problems include inspection of pipelines, railwa…
SIDGEIPA: an Archaeological Information System
2001
En el artículo se presenta un nuevo sistema de información arqueológica: SIDGEIPA -SIstema Distribuido para la GEstión Integral del Patrimonio Arqueológico- SIDGEIPA va más allá de la adaptación de un Sistema de Información Geográfica a la Gestión del Patrimonio arqueológico. Las características más destacables de SIDGEIPA son: el estar desarrollado en código Java lo que implica su capacidad multiplataforma; automatización de la matriz Harris, se trata de una aplicación única con la que se pueden realizar todos los procesos informáticos relacionados con la gestión del patrimonio arqueológico (Dibujo asistido por ordenador, base de datos, procesado de imágenes y otros. Los datos que se prese…
Videotutoriales para la enseñanza de los Sistemas de Información Geográfica aplicados a la arqueología
2019
La experiencia que presentamos aquí se llevó a cabo durante el curso 2018-2019 en las clases prácticas de la asignatura Metodología Arqueológica (tercer curso del grado de Historia). El objetivo de aprendizaje principal de las clases prácticas de esta asignatura se focaliza en que el alumnado se familiarice con las herramientas básicas de los Sistemas de Información Geográfica (SIG) que le permitan resolver problemas de naturaleza arqueológica. Para ello, durante el curso, decidimos aplicar nuevos recursos (vídeo tutoriales) y nuevas metodologías (Flipped Teaching), con el interés de mejorar los resultados de aprendizaje del alumnado. La metodología implica la inversión de la taxonomía de B…
Termini Imerese: rilettura topografica per un’ipotesi restitutiva dell’impianto urbano
2018
I risultati che si presentano in questa sede sono frutto di una rivisitazione dello stato dell’arte, facilitata dall’informatizzazione dei dati topografici, dall’implementazione di una piattaforma GIS e dalla reperibilità di supporti cartografici a dettagli sempre maggiori. La rilettura topografica dell’edito si è posta come obiettivo la ricostruzione virtuale della potenziale maglia urbana dell’antica Thermae, quello che viene definito in genere il piano programmatico, in attesa che nuovi rinvenimenti contribuiscano a ridefinire le dimensioni del modulo di base e soprattutto quelle reali degli isolati abitativi. Il confronto con fondazioni coeve e culturalmente affini (Solunto, in primo lu…
Modelling and Analysis of Nonstationary Vehicle-to-Infrastructure Channels with Time-Variant Angles of Arrival
2018
In mobile radio channel modelling, it is generally assumed that the angles of arrival (AOAs) are independent of time. This assumption does not in general agree with real-world channels in which the AOAs vary with the position of a moving receiver. In this paper, we first present a mathematical model for the time-variant AOAs. This model serves as the basis for the development of two nonstationary multipath fading channels models for vehicle-to-infrastructure communications. The statistical properties of both channel models are analysed with emphasis on the time-dependent autocorrelation function (ACF), time-dependent mean Doppler shift, time-dependent Doppler spread, and the Wigner-Ville sp…
Wireless Caching Aided 5G Networks
2018
Statistical modeling, simulation, and experimental verification of wideband indoor mobile radio channel
2018
This paper focuses on the modeling, simulation, and experimental verification of wideband single-input single-output (SISO) mobile fading channels for indoor propagation environments. The indoor reference channel model is derived from a geometrical rectangle scattering model, which consists of an infinite number of scatterers. It is assumed that the scatterers are exponentially distributed over the two-dimensional (2D) horizontal plane of a rectangular room. Analytical expressions are derived for the probability density function (PDF) of the angle of arrival (AOA), the PDF of the propagation path length, the power delay profile (PDP), and the frequency correlation function (FCF). An efficie…
An Effective Wireless Sensor Network Routing Protocol Based on Particle Swarm Optimization Algorithm
2022
Improving wireless communication and artificial intelligence technologies by using Internet of Things (Itoh) paradigm has been contributed in developing a wide range of different applications. However, the exponential growth of smart phones and Internet of Things (IoT) devices in wireless sensor networks (WSNs) is becoming an emerging challenge that adds some limitations on Quality of Service (QoS) requirements. End-to-end latency, energy consumption, and packet loss during transmission are the main QoS requirements that could be affected by increasing the number of IoT applications connected through WSNs. To address these limitations, an effective routing protocol needs to be designed for …
In the Direction of Service Guarantees for Virtualized Network Functions
2022
The trend of consolidating network functions from specialized hardware to software running on virtualization servers brings significant advantages for reducing costs and simplifying service deployment. However, virtualization techniques have significant limitations when it comes to networking as there is no support for guaranteeing that network functions meet their service requirements. In this paper, we present a design for providing service guarantees to virtualized network functions based on rate control. The design is a combination of rate regulation through token bucket filters and the regular scheduling mechanisms in operating systems. It has the attractive property that traffic profi…
Face Mask Detection Using Deep Convolutional Neural Network and MobileNetV2-Based Transfer Learning
2022
The rapid spreading of Coronavirus disease 2019 (COVID-19) is a major health risk that the whole world is facing for the last two years. One of the main causes of the fast spreading of this virus is the direct contact of people with each other. There are many precautionary measures to reduce the spread of this virus; however, the major one is wearing face masks in public places. Detection of face masks in public places is a real challenge that needs to be addressed to reduce the risk of spreading the virus. To address these challenges, an automated system for face mask detection using deep learning (DL) algorithms has been proposed to control the spreading of this infectious disease effecti…