Javier Silvestre-Blanes

Javier Silvestre-Blanes
Universitat Politècnica de València | UPV · Department of Computer Engineering

Dr. Computer Architecture

About

61
Publications
9,858
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409
Citations
Citations since 2017
20 Research Items
245 Citations
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20172018201920202021202220230204060
20172018201920202021202220230204060
20172018201920202021202220230204060
Additional affiliations
January 2000 - present
Politècnica de València
Position
  • Titular de Universidad

Publications

Publications (61)
Article
Full-text available
Slope Entropy (SlpEn) is a very recently proposed entropy calculation method. It is based on the differences between consecutive values in a time series and two new input thresholds to assign a symbol to each resulting difference interval. As the histogram normalisation value, SlpEn uses the actual number of unique patterns found instead of the the...
Article
Full-text available
Industry 4.0 digitization requirements have led to widespread adoption of industrial wireless sensor networks (IWSNs) in manufacturing environments. These require strict control of the traffic flowing over the network to ensure the quality of service. Software-defined networks (SDNs) can address this challenge, as their centralized operation allows...
Article
Full-text available
Industrial Wireless Sensor Networks (IWSN) are becoming increasingly popular in production environments due to their ease of deployment, low cost and energy efficiency. However, the complexity and accuracy demanded by these environments requires that IWSN implement quality of service mechanisms that allow them to operate with high determinism. For...
Article
Full-text available
Communication networks are a key element in the development of Smart Cities. This field is a constantly evolving environment, for which new protocols are constantly appearing. Due to the heterogeneous nature of the technologies, the most appropriate candidate must be selected in order to get the best performance to satisfy the application requireme...
Article
Full-text available
The growing use of mobile nodes in manufacturing environments is increasing the Quality of Service (QoS) requirements of the communications infrastructures that support them, as is the case with Industrial Wireless Sensor Networks (IWSN). Managing networks using Software Defined Networks (SDN) addresses the challenge of handling multiple sources in...
Article
Full-text available
Emerging Industry 4.0 applications require ever-increasing amounts of data and new sources of information to more accurately characterize the different processes of a production line. Industrial Internet of Things (IIoT) technologies, and in particular Wireless Sensor Networks (WSNs), allow a large amount of data to be digitized at a low energy cos...
Article
Full-text available
The adoption of LoRaWAN as a technology for wireless deployments in many applications, such as smart cities or industry 4.0, still presents challenges such as energy consumption, robustness, or reduced throughput in harsh, noisy scenarios. Class B is a MAC mode that allows better performance in downlink traffic but has difficulties regarding scalab...
Article
Full-text available
Wireless sensor networks (WSNs) play a key role in the ecosystem of the Industrial Internet of Things (IIoT) and the definition of today’s Industry 4.0. These WSNs have the ability to sensor large amounts of data, thanks to their easy scalability. WSNs allow the deployment of a large number of self-configuring nodes and the ability to automatically...
Article
Full-text available
IWSNs (Industrial Wireless Sensor Networks) have become the next step in the evolution of WSN (Wireless Sensor Networks) due to the nature and demands of modern industry. With this type of network, flexible and scalable architectures can be created that simultaneously support traffic sources with different characteristics. Due to the great diversit...
Article
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Low-power wide-area network (LPWAN) technologies are becoming a widespread solution for wireless deployments in many applications, such as smart cities or Industry 4.0. However, there are still challenges to be addressed, such as energy consumption and robustness. To characterize and optimize these types of networks, the authors have developed an o...
Article
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Today, a wide range of developments and paradigms require the use of embedded systems characterized by restrictions on their computing capacity, consumption, cost, and network connection. The evolution of the Internet of Things (IoT) towards Industrial IoT (IIoT) or the Internet of Multimedia Things (IoMT), its impact within the 4.0 industry, the e...
Article
Full-text available
The Industrial Internet of Things (IIoT) is having an ever greater impact on industrial processes and the manufacturing sector, due the capabilities of massive data collection and interoperability with plant processes, key elements that are focused on the implementation of Industry 4.0. Wireless Sensor Networks (WSN) are one of the enabling technol...
Article
Full-text available
The use of image processing for the detection and classification of defects has been a reality for some time in science and industry. New methods are continually being presented to improve every aspect of this process. However, these new approaches are applied to a small, private collection of images, which makes a real comparative study of these m...
Article
Full-text available
Wireless Sensor Networks have become a key enabler for Industrial Internet of Things (IoT) applications; however, to adapt to the derived robust communication requirements, deterministic and scheduled medium access should be used, along with other features, such as channel hopping and frequency diversity. Implementing these mechanisms requires a co...
Article
Full-text available
This paper introduces a novel quality estimator that uses different metrics to decide the best path towards the root in Wireless Sensor Networks. The different metrics are assessed at medium access control layer (MAC), under the IEEE 802.15.4 standard, and are used at network layer, enhancing the best path selection process done by the routing prot...
Article
Full-text available
Industrial Internet of Things (IIoT) is a disruptive paradigm which will bring new ways of monitoring, control and management for Industry 4.0 and Smart Cities. It relies on smart and connected sensors enabled by a new generation of communication technologies such as Wireless Sensor Networks (WSN). Although various solutions are becoming available,...
Conference Paper
Full-text available
Only two paradigms have traditionally been considered in this field: the transmission of raw information to be processed remotely; or compression of information prior to transmission. This dichotomy has generally only been analysed from the point of view of the impact of data compression prior to transmission on image processing. The appearance of...
Conference Paper
Full-text available
Emerging Wireless Sensor Networks (WSN) give support to a wide diversity of applications, but these networks are based on devices with limited resources, requiring communication protocols such as RPL (Routing Protocol for Low power lossy networks) which allow the routes to be fitted to certain requirements. In this paper, we design a custom energy...
Article
In spite of their limitations, wireless networks are being increasingly used in industrial environments. The electromagnetic phenomena that can occur, along with the interference that may occur due to it being an open medium, mean that fluctuations in latencies are often produced. These drawbacks limit the use of wireless networks for distributed f...
Conference Paper
Full-text available
Video sequences are usually classified as low or high motion, depending on a range of arbitrary considerations chosen by the observer. Depending on this classification diferent actions can be taken. For example, some parameters in video compression could be modified to adapt to the best behaviour of the video sequence. The best example of this is t...
Conference Paper
Full-text available
A broad range of image processing applications require image databases during development and testing. Whilst some image databases have been assembled with specific applications in mind, others are intended for more general use, with image content that is purposefully not application-specific. General-purpose image databases are in frequent use in...
Article
The measurement and evaluation of the appearance of wrinkling in textile products after domestic washing and drying is performed currently by the comparison of the fabric with the replicas. This kind of evaluation has certain drawbacks, the most significant of which are its subjectivity and its limitations when used with garments. In this paper, we...
Article
Full-text available
Industrial media control applications require on-line QoS management services to dynamically allocate the bandwidthamongthe entities that composethe distributed application. The bandwidth distribution mechanism assigns bandwidth to each entity based on the QoS requirements and the current state of the network. However, mapping that bandwidth into o...
Article
Presence sensors for energy control based on classic technologies to detect movement are now commonly seen in many areas of life. However, their use in structurally complex environments is not very common, due to their lack of reliability in these types of situations. Falling prices in technologies associated with surveillance applications are lead...
Article
The need to obtain objective values of the quality of distorted images with respect to the original is fundamental in multimedia and image processing applications. It is generally required that this value correlates well with the human vision system (HVS). In spite of the properties and the general use of the Mean Square Error (MSE) measurement, th...
Article
Full-text available
A growing number of industrial applications incorporate multimedia information processing. These multimedia applications are commonly distributed and subject to time constraints that must be met across networks without creating intolerable interference over typical control flows. However, multimedia traffic, in general, and video streaming, in part...
Conference Paper
Full-text available
Recent metrics to objectively evaluate image quality based on measuring structural changes, and not on measuring the error, have led to improvements in evaluation with respect to the human vision system. Various analyses based on calculating the correlation between values obtained from subjective experiments and those obtained objectively have show...
Conference Paper
Full-text available
Urban facility interconnection networks require a robustness and reliability usually found in public networks or private cable and radio networks in licensed bands. Both factors mean an increase in costs, which also increase as the size of the network increases. The recent rise in use of wireless technologies in open wavebands has attracted the int...
Chapter
The use of VAN infrastructures to give support to applications in the traditional areas of industrial networks , and in particular in applications with MAN requirements, as can be found in building automation, or the case studied here; utilities network control, is viable but with limitations. The use of wireless networks such as WiMAX allows propr...
Article
Full-text available
In this paper we expose our present work on a real-time monitoring system of human activities, using only a single cell phone equipped with some particular sensors. This way the monitoring system is reduced to the minimum expression, no especial hardware is required as far as a conventional cell phone will monitor the user. In particular, we expose...
Conference Paper
In distributed multimedia applications, an information compression stage is usually necessary. The objective here is to obtain a compression rate that makes the application viable. In this stage, reductions in image quality are often produced in order to reach high rates of compression. This image degradation must be measured and known in order to...
Article
For a particular multimedia application where compression is necessary, a great number of compression standards are available which could be useful. Generally, the decisive parameter when choosing is the quality of the compression, without properly considering the latency introduced by this process. In this paper we try to show that choosing a comp...
Conference Paper
Full-text available
Currently, falling prices in technologies associated with surveillance applications has led to a huge increase in their use in all types of environments, although the most common applications are monitoring of traffic and people. In surveillance applications, the majority of the algorithms and applications are based on robustness in the detection a...
Conference Paper
Full-text available
The use of multimedia within industrial applications has become commonplace, targetting improved process monitoring and machine vision. In both cases, the multimedia information is commonly distributed and subject to time constraints that must be met across networks while avoiding untolerable interference over typical control flows. This can be ach...
Article
Recently, much attention has been given to the need to endow industrial communication networks used in real-time systems with flexible scheduling. This allows control systems to adapt to the variations in the requirements of traffic generated by modifications in the environment of the system, or changes in its structure. Another active area is mult...
Article
Different communication alternatives that form an Heterogeneous Network for a Supervision and Control System of the purification network of a large city are evaluated in order to determine their viability for the supervision and control of the system. In addition there is a study of which offers the best services and costs for different scenarios....
Article
Full-text available
Currently, there are many local area industrial networks that can give guaranteed bandwidth to synchronous traffic, partic- ularly providing CBR channels (Constant Bit Rate), which allow improved bandwidth management. Some of such networks operate over Ethernet, delivering channels with enough capacity, specially with compressors, to integrate mult...
Conference Paper
Full-text available
The limitation in maximum packet size of fieldbuses, is one of the characteristics that limit throughput in these networks. This restricts the range of multimedia applications viable over these infrastructures. In Ethernet, the limitation of 1500 bytes is currently being surpassed by the use of jumbo-frames, which offer a maximum frame size of 9 Kb...
Conference Paper
Full-text available
New automation technologies are introducing important changes in company production organization in all sectors, and particularly, in yarn textile factories. As a result of these changes, the product moves automatically from the point where production begins to the point where it is packed, without human intervention. Thus, the generation of any fl...
Conference Paper
Full-text available
The impact of the use of mobile devices by means of GPRS (general packet radio service) technology to access environmental information in real time, provided by sensors strategically placed in a metropolitan area has been studied with the objective of using this information to find out rainfall volume and phreatic levels in times of emergency. This...
Article
Full-text available
In this paper a automated analysis system for defect de-tection in the print process of flocked fabrics with repet-itive patterns is presented. This process represents a less computationally complex method than the detection of any type of pattern in the print process. For this reason, this problem can be solved using a personal computer (PC) in-sp...
Article
Full-text available
Wireless Local area networks (wLANs), particularly from standards 802.1b/g, have become extremely widespread in a very short time, in society in general as well as at an industrial level. One of the limitations of this technology is its coverage. The family of new standards, such as 802.16, allows us to overcome these limitations, enabling then the...
Article
The present systems of control based on polling by radio frequency must evolve to be able to carry advanced telecommunication services, such as capture and multimedia information management as well as control information. In this paper a supervision and control system based in public networks that complements a classic polling system allowing to in...
Article
The mechanisms for static scheduling are inefficient and inadequate when the traffic being carried varies greatly in its bandwidth requirements, especially if there are also variations in run time. For this reason, dynamic traffic scheduling over Profibus, with the objective of developing flexible scheduling systems over this network is analyzed. T...
Article
Full-text available
Currently, the research and development of multimedia networking systems is getting an great impulse due to the demand of applications and services from the entertainment and audio-visual industry. Both, networks and media coding systems are tightly coupled with this kind of applications. In particular, we are working with video transmission over w...
Conference Paper
Full-text available
This paper analyses, by means of a real implementation, the ability of Profibus to transport images, analyzing its repercussion on the periodic traffic of control, and the measures concerning MAC (medium access control) that can be taken in order to minimize this incidence while optimizing image transportation. The paper focuses on image transport...
Conference Paper
Full-text available
In this paper, a system for the transport of images across Profibus industrial networks acting as support to the monitoring and control system of industrial processes is implemented and evaluated. The capacity of Fieldbus Data Link (FDL) to support the transport of images and the impact on the performance achieved through the utilization of compres...
Article
In this paper the use of Profibus is analyzed for image transport that is going to be used in a typical process of industrial computer vision. The capabilities of the industrial network for simultaneously transporting this type of traffic with typical traffic control is evaluated. Likewise, the increase that can be obtained in the number of images...
Article
Full-text available
Mediante este trabajo se pretende difundir el enfoque práctico que, desde la Escuela Politécnica Superior de Alcoi (EPSA), se le está dando a la asignatura de Informática Industrial. Debido a las especiales características del entorno socio-económico de la comarca en la que se enclava la EPSA, la oferta de una informática aplicada al campo industri...
Article
Full-text available
En los últimos años se ha dado un increment o exponencial en el uso y desarrollo de todo tipo de aplicaciones multimedia, como la videovigilancia, los sistemas de visión industriales o los sistemas de telediagnóstico y análisis de imagen médica. En este tipo de aplicaciones el elemento de entrada al sistema es la imagen. La calidad de la imagen de...

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Project (1)
Project
This project aims to contribute to the study of resource management mechanisms in the radio access network (RAN) and of mobility management mechanisms, for 5G technology. The main focus of this project is on the RAN, although some of these mechanisms may involve core network functions responsible for the control of the RAN (e.g., Access and Mobility Management Function for mobility management). More specifically, we will explore the resource management mechanisms of a network infrastructure that support the NS concept. This project will address the management of physical and virtual resource allocation to tenants by the infrastructure provider, as well as the business models associated with this provider-tenant relationship.