Piedad Garrido

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Verified

Piedad verified their affiliation via an institutional email.

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• Ph.D.
• Full Professor at University of Zaragoza

LoRa has proven to be an ideal solution for Internet of Things networks and applications that require long‐distance communications, such as those related to smart cities or precision agriculture. Its low cost combined with the wide availability of LoRa‐compatible devices make it possible to easily deploy a large number of sensors capable of collect...

Proprietary systems used to modernize Industry 4.0 usually involve high financial costs. Consequently, using low-cost devices with the same functionalities, capable of replacing these proprietary systems but at a lower cost, has become an incipient trend. However, these low-cost devices usually come with electromagnetic interference problems as the...

Transitioning toward Industry 4.0 requires major investment in devices and mechanisms enabling interconnectivity between people, machines, and processes. In this article, we present a low-cost system based on the Raspberry Pi platform to measure the overall equipment effectiveness (OEE) in real time, and we propose two filtering mechanisms for elec...

Electric Vehicles (EVs) market penetration rate is continuously increasing due to several aspects such as pollution reduction initiatives, government incentives, cost reduction, and fuel cost increase, among others. In the vehicular field, researchers frequently use simulators to validate their proposals before implementing them in real world, whil...

Electric Vehicles (EVs) are gaining momentum due to several factors, including the price reduction as well as the climate and environmental awareness. This paper reviews the advances of EVs regarding battery technology trends, charging methods, as well as new research challenges and open opportunities. More specifically, an analysis of the worldwid...

Wikipedia categories, a classification scheme built for organizing and describing Wikpedia articles, are being applied in computer science research. This paper adopts a systematic literature review approach, in order to identify different approaches and uses of Wikipedia categories in information retrieval research. Several types of work are identi...

More than 50 countries and international organisations worldwide are currently working on strategies and policies to promote a transition to a bioeconomy. This economic system centres on a sustainable use of bio- and renewable resources to guarantee sustainability. Although many contributions have been made to the field of bioeconomy, most focus on...

Wikipedia categories, a classification scheme built for organizing and describing Wikpedia articles, are being applied in computer science research. This paper adopts a systematic literature review approach, in order to identify different approaches and uses of Wikipedia categories in information retrieval research. Several types of work are identi...

It is essential to establish smart and efficient charging strategies for electric vehicles, due to the increase of their sales, and especially taking into account that many of these vehicles will be recharged in private parking lots, where the charging points features are limited. In this article, we propose four different charging methods: the che...

In this paper, we propose a comprehensive architecture based on vehicular communication technologies, considering vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) communications. In addition, we present a study about EVs charging load. Our proposal addresses three main issues: (i) knowledge of the number of vehicles that are going to re...

https://zaguan.unizar.es/record/56799?ln=es

Research on vandalism in Wikipedia has been of interest for the last decade. This paper performs a literature review on the subject, with the goal of identifying the main research topics and approaches, methods and techniques used. 67 papers have been reviewed. Main topic is the detection of vandalism, although there is a increasing interest about...

Research on vandalism in Wikipedia has been of interest for the last decade. This paper performs a literature review on the subject, with the goal of identifying the main research topics and approaches, methods and techniques used. 67 papers have been reviewed. Main topic is the detection of vandalism, although there is a increasing interest about...

Non-emergency Patient Transport Services (PTS) are provided by ambulance companies for patients who do not require urgent and emergency transport. These patients require transport to or from a health facility like a hospital, but due to clinical requirements are unable to use private or public transport. This task is performed nowadays mainly by hu...

Vehicle-to-vehicle (V2V) communications also known as vehicular ad hoc networks (VANETs) allow vehicles to cooperate to increase driving efficiency and safety on the roads. In particular, they are forecasted as one of the key technologies to increase traffic safety by providing useful traffic services. In this scope, vehicle-to-vehicle disseminatio...

Vehicular ad hoc networks (VANETs) are wireless communication networks which support cooperative driving among vehicles on the road. The specific characteristics of VANETs favor the development of attractive and challenging services and applications which rely on message exchanging among vehicles. These communication capabilities depend directly on...

The tourism sector in the province of Teruel (Aragon, Spain) is increasing rapidly. Although the number of domestic and foreign tourists is continuously growing, there are some tourist attractions spread over a wide geographical area, which are only visited by a few people at specific times of the year. Additionally, having human tourist guides eve...

Wireless technologies are making the development of new applications and services in vehicular environments possible since they enable mobile communication between vehicles (V2V), as well as communication between vehicles and infrastructure nodes (V2I). Usually, V2V communications are dedicated to the transmission of small messages mainly focused o...

Reference management software is a well-known tool for scientific research work. Since the 1980s, it has been the subject of reviews and evaluations in library and information science literature. This paper presents a systematic review of published studies that evaluate reference management software with a comparative approach. The objective is to...

The number of vehicles in our roads is drastically increasing, especially in developing countries. In addition, these vehicles tend to be concentrated in urban areas which present a large population. Since traffic jams have important and mostly negative consequences, such as increasing travel time, fuel consumption, and air pollution, governments a...

Efficient message dissemination is of utmost importance to propel the development of useful services and applications in Vehicular ad hoc Networks (VANETs). In this paper, we propose a novel adaptive system that allows each vehicle to automatically adopt the most suitable dissemination scheme in order to fit the warning message delivery policy to e...

Emerging ITS applications such as fleet management and point of interest distribution require vehicles to have Internet access. However, allowing vehicles to access to the Internet is particularly challenging due to the special characteristics of the vehicular environment. So far, multicasting approaches have been demonstrated to be effective for s...

Este trabajo revisa el comportamiento informacional de una comunidad de estudiantes universitarios durante el desarrollo de una actividad de aprendizaje con un wiki. Mediante el estudio de caso, analiza los datos disponibles en el wiki, e identifica pautas de creación y organización de contenidos. El estudio del wiki se realiza también dentro del m...

The proportion of women in engineering and technology degrees does not reach 30%, and multiple activities are performed worldwide to change this situation. This paper presents the effects of the Girls' Day activities organized at University of Zaragoza (Aragón, Spain) yearly from 2008. It consists on a day where women who play important roles, both...

Efficient schemes for warning message dissemination in vehicular ad hoc networks (VANETs) use context information collected by vehicles about their neighbor nodes to guide the dissemination process. Based on this information, vehicles autonomously decide whether or not they are the most appropriate forwarding nodes. These schemes maximize their per...

Research works regarding vehicular communications usually obviate assessing the proposals in scenarios including adverse vehicle densities, despite such scenarios are quite common in real urban environments. In this paper, we study the effect of these hostile conditions on the performance of different schemes providing warning message dissemination...

Vehicular networks supporting cooperative driving on the road have attracted much attention due to the plethora of new possibilities they offer to modern Intelligent Transportation Systems. However, research works regarding vehicular networks usually obviate assessing their proposals in scenarios including adverse vehicle densities, i.e., density v...

Road traffic is experiencing a drastic increase, and vehicular traffic congestion is becoming a major problem, especially in metropolitan environments throughout the world. Additionally, in modern Intelligent Transportation Systems (ITS) communications, the high amount of information that can be generated and processed by vehicles will significantl...

In Vehicular ad hoc Networks (VANETs), efficient dissemination of messages is a key factor to speed up the development of useful services and applications. In this paper, we propose a novel algorithm that automatically chooses the best dissemination scheme trying to fit the warning message delivery policy to the current characteristics of each spec...

A critical issue, especially in urban areas, is the occurrence of traffic accidents, since it could generate traffic jams. Additionally, these traffic jams will negatively affect to the rescue process, increasing the emergency services arrival time, which can determine the difference between life or death for injured people involved in the accident...

Efficient schemes for warning message dissemination in vehicular ad hoc networks (VANETs) use context information collected by vehicles about their neighbor nodes to guide the dissemination process. These schemes maximize their performance when all the vehicles advertise correct information about their positions, and hence position errors may drast...

Digital libraries are a product of digital information aimed at satisfying users’ information needs, through collections of documents to which value added services are provided. To ensure the correct functioning of digital libraries and the services they provide it is essential to adequately include an understanding of the needs of users and their...

Nowadays, traffic jams in urban areas have become a problem that keeps growing every year since the number of vehicles in our cities is continuously increasing. One of the most common causes producing traffic jams are vehicle accidents. Moreover, the arrival time of the emergency services could be raised due to traffic congestion. Intelligent Trans...

Currently, the number of vehicles increases every year, raising the probability of having accidents. When an accident occurs, wireless technologies enable vehicles to share warning messages with other vehicles by using vehicle to vehicle (V2V) communications, and with the emergency services by using vehicle to infrastructure (V2I) communications. R...

Road traffic is experiencing a drastic increase in recent years, thereby increasing the every day traffic congestion problems, especially in cities. Vehicle density is one of the main metrics used for assessing the road traffic conditions. Currently, most of the existing vehicle density estimation approaches, such as inductive loop detectors or tra...

In recent years, new applications, architectures, and technologies have been proposed for vehicular ad hoc networks (VANETs). Regarding traffic safety applications for VANETs, warning messages have to be quickly and smartly disseminated in order to reduce the required dissemination time and to increase the number of vehicles receiving the traffic w...

Vehicle density is one of the main metrics used for assessing the road traffic conditions. In this paper, we present a solution to estimate the density of vehicles that has been specially designed for Vehicular Networks. Our proposal allows Intelligent Transportation Systems to continuously estimate the vehicular density by accounting for the numbe...

Nowadays, the percentage of elderly people is increasing, especially in developed countries. Technological products can be used to propel a cohesive and inclusive inter-generational society, although they should be adapted to satisfy the needs and preferences of elderly people. In this paper, we present 3D virtual agents as a promising system to im...

In recent years, new architectures and technologies have been proposed for Vehicular Ad Hoc networks (VANETs). Due to the cost and complexity of deploying such networks, most of these proposals rely on simulation. However, we find that most of the experiments made to validate these proposals tend to overlook the most important and representative fa...

In Vehicular Networks, communication success usually depends on the density of vehicles, since a higher density allows having shorter and more reliable wireless links. Thus, knowing the density of vehicles in a vehicular communications environment is important, as better opportunities for wireless communication can show up. However, vehicle density...

The development of communication technologies integrated in vehicles allows creating new protocols and applications to improve assistance in traffic accidents. Combining this technology with intelligent systems will permit to automate most of the decisions needed to generate the appropriate sanitary resource sets, thereby reducing the time from the...

New communication technologies integrated into modern vehicles offer an opportunity for better assistance to people injured in traffic accidents. Recent studies show how communication capabilities should be supported by artificial intelligence systems capable of automating many of the decisions to be taken by emergency services, thereby adapting th...

Resumen Los sistemas de gestión de contenidos (content management systems, CMS) son paquetes de software que permiten crear, publicar y archivar contenidos digitales. En estas plataformas desempeñan un papel fundamental los mecanismos de clasificación de los contenidos informativos. Este trabajo evalúa la implementación de funcionalidades para esqu...

La integración de herramientas del web social en los procesos de enseñanza y aprendizaje se ha vuelto común en la enseñanza universitaria en la última década. En cambio, los marcos de evaluación sobre los resultados que ofrece y la satisfacción de sus usuarios no han evolucionado todavía de forma comparable. Este trabajo expone el desarrollo de dos...

Topic Maps, and their XTM specification, have been revealed as a powerful tool especially designed to describe and organize digital information resources in the last decade. The availability of the ISO standard, and its specialization and revision, reflect the importance of the description scheme, as well as their gathering market and the increasin...

The use of OPACs has been one of the problems that users of libraries have faced. The application of Web 2.0 techniques in OPACs has favored the interaction between users and library automation systems. However, these improvements focus on aspects of collaboration and recommendation rather than on aspects of cognitive work. In this field, the contr...

With new Web tools, information can be released to flow in every direction (library to user, user to library, library to library, and user to user). Western Michigan University (WMU) implemented VuFind as the primary OPAC interface for its Voyager system in September 2009. VuFind includes many Web 2.0 catalog features such as user tagging, comments...

In response to two different pedagogical challenges, namely delivering varied library instruction to a big first year class and delivering a focused library instruction to a varied group, librarians at an academic institution created online guides. These guides, built in LibGuides with many Web 2.0 tools included, effectively delivered the desired...

The indicators that have traditionally been used to measure the activity of a library user satisfaction and other management data are not sufficient in the Library 2.0. This is a context in which in order to deliver user-centric services through the Web, libraries are increasingly using heterogeneous and specialized tools, which are not included in...

This chapter studies user interfaces of Web Online Public Access Catalogs (OPACs) and presents their principal difficulties in facing the man-machine interaction and the contributions of Web 2.0 to overcome these limitations. Methodologies used to study OPACs interfaces are examined. A quantitative approach is used to analyze Web OPACs in academic,...

The authors redesign the user interface of an online library catalog, leveraging current Web technologies that allow dynamic and fine-grained user interaction. Over the course of their iterative design and test cycle, they identified four key areas where such dynamic Web technologies can be used to improve the support for typical information seekin...

In this chapter, the authors review current literature on personal information management to analyze how it is understood with the aim of reviewing the way in which individuals try to manage their personal information and whether libraries observe the information behavior of their community members to learn which is the best way to offer their serv...

Apache Solr, an open source Java-based search engine, forms the core of many Library 2.0 products. The use of an index in place of a relational database allows faster data retrieval along with key features like faceting and similarity analysis that are not practical in the previous generation of library software. The popular VuFind discovery tool w...

Libraries have been trying hard to produce and aggregate resources in both print and digital formats, which need to be integrated into the library system to provide access to users. This chapter summarizes the rapidly changing cataloging and metadata processing workflows in libraries and discusses the increasing need of exploiting XML technologies,...

Vehicles are nowadays provided with a variety of new sensors capable of gathering information about themselves and from their surroundings. In a near future, these vehicles will also be capable of sharing all the harvested information, with the surrounding environment and among nearby vehicles over smart wireless links. They will also be able to co...

Knowing the density of vehicles in a vehicular communications environment is important, as better opportunities for wireless communication can show up. This paper studies the importance of predicting the density of vehicles in vehicular environments to take decisions for enhancing the dissemination of warning messages between vehicles. Moreover, we...

In this article, e-NOTIFY system is presented, which allows fast detection of traffic accidents, improving the assistance to injured passengers by reducing the response time of emergency services through the efficient communication of relevant information about the accident using a combination of V2V and V2I communications. The proposed system requ...

In a near future, vehicles will be provided with a variety of new sensors capable of gathering information from their surroundings. These vehicles will also be capable of sharing the harvested information via Vehicular Ad hoc NETworks (VANETs) with nearby vehicles, or with the emergency services in case of an accident. Hence, distributed applicatio...

Nowadays, protection of personal data is an important issue when developing software. In 1999, the Organic Law of Personal Data (LOPD) was passed in Spain. According to this Law, every computer application which works with personal data has to be adapted to be in accordance with the LOPD requirements. However, there is no doubt that many personal d...

Research in Vehicular Networks (VNs) has found in simulation the most useful method to test new algorithms and techniques. This is mainly due to the high cost of deploying such systems in real scenarios. When simulating vehicular environments, two different issues must be addressed: mobility and wireless communications. Regarding mobility, several...

New communication technologies integrated into modern vehicles offer an opportunity for better assistance to people injured in traffic accidents. To improve the overall rescue process, a fast and accurate estimation of the severity of the accident represents a key point to help the emergency services to better determine the amount of required resou...

Resumen Los marcadores sociales son sistemas de etiquetado social de enlaces que han sido ampliamente utilizados en bibliotecas y servicios de información. Sin embargo, no se ha llevado a cabo un estudio del modelo de gestión de información subyacente, ni de las funcionalidades técnicas necesarias para cumplir con los requerimientos del modelo. Est...

Current generic Research, Development and Innovation (R&D&i) management systems implemented in businesses lack of project requirements specification and they hardly integrate IT control issues. This paper focuses on the definition of a model for managing R&D&i projects in companies. This model, based on ISO/UNE 166002:2006 [1] standard, addresses t...

In recent years, new applications, architectures and technologies have been proposed for Vehicular ad hoc networks (VANETs). Regarding traffic safety applications for VANETs, warning messages have to be quickly disseminated in order to reduce the required dissemination time and to increase the number of vehicles receiving the traffic warning inform...

The new communication technologies integrated into the automotive sector offer an opportunity for better assistance to people injured in traffic accidents, reducing the response time of emergency services, and increasing the information they have about the incident. Determining more accurately the human and material resources required for each part...

In traffic safety applications for Vehicular Ad hoc Networks (VANETs), warning messages have to be disseminated whenever a dangerous situation occurs to alert nearby vehicles. Using inefficient broadcast schemes may lead to ineffective dissemination of warning messages causing broadcast storm problems. In the past, several approaches have been prop...

Las herramientas groupware (software para trabajo en grupo) han sido el estándar en la coordinación del trabajo en las organizaciones. El desarrollo creciente de prestaciones sociales, gracias a las redes sociales, ha popularizado el trabajo en colaboración. En primer lugar se pretende definir un modelo de análisis de funcionalidad y uso de groupwa...

This paper presents HyBook, an ad-hoc tool which was designed and implemented with the objective of improving the workflow management, and to allow the possibility of automatically generating e-books regarding educational courses at the Instituto de Ciencias de la Educaciòn (ICE) of the Universidad de Zaragoza (UZ). So far, when the ICE of the UZ w...