Diana Bri

Bio: Diana Bri is an academic researcher from Polytechnic University of Valencia. The author has contributed to research in topics: Wireless sensor network & Wireless network. The author has an hindex of 11, co-authored 35 publications receiving 675 citations. Previous affiliations of Diana Bri include University of Valencia.

A wireless sensor network deployment for rural and forest fire detection and verification.

Abstract: Forest and rural fires are one of the main causes of environmental degradation in Mediterranean countries. Existing fire detection systems only focus on detection, but not on the verification of the fire. However, almost all of them are just simulations, and very few implementations can be found. Besides, the systems in the literature lack scalability. In this paper we show all the steps followed to perform the design, research and development of a wireless multisensor network which mixes sensors with IP cameras in a wireless network in order to detect and verify fire in rural and forest areas of Spain. We have studied how many cameras, sensors and access points are needed to cover a rural or forest area, and the scalability of the system. We have developed a multisensor and when it detects a fire, it sends a sensor alarm through the wireless network to a central server. The central server selects the closest wireless cameras to the multisensor, based on a software application, which are rotated to the sensor that raised the alarm, and sends them a message in order to receive real-time images from the zone. The camera lets the fire fighters corroborate the existence of a fire and avoid false alarms. In this paper, we show the test performance given by a test bench formed by four wireless IP cameras in several situations and the energy consumed when they are transmitting. Moreover, we study the energy consumed by each device when the system is set up. The wireless sensor network could be connected to Internet through a gateway and the images of the cameras could be seen from any part of the world.

A Study of Virtual Learning Environments

Abstract: This paper analyzes several features of virtual learning environments. These tools are basic for new models of education because their basic idea is to reduce the number of hours face-to-face in the classroom and to promote remote individual work. This is the main purpose of the new European models given by the Bologna process. Four studies have been made. First of them, shows level of popularity of each environment according number of entrances in two web searchers. From this previous study, we have chosen the most popular environments and we will give the details of their features and main differences between them. We are going analyze existing environments to create online learning communities and so, promoting online learning. Next, we will show a study this type of educational social software. This study involves a questionnaire to some lecturers of our university, Polytechnic University of Valencia. Our analysis presents most important results. Then, we have studied the virtual learning environments used in the Spanish universities. It will show us which of them are more used in Spain. Finally in the last part of the paper, we will show a performance evaluation of the two main environments.

A Cluster-Based Architecture to Structure the Topology of Parallel Wireless Sensor Networks

Abstract: A wireless sensor network is a self-configuring network of mobile nodes connected by wireless links where the nodes have limited capacity and energy. In many cases, the application environment requires the design of an exclusive network topology for a particular case. Cluster-based network developments and proposals in existence have been designed to build a network for just one type of node, where all nodes can communicate with any other nodes in their coverage area. Let us suppose a set of clusters of sensor nodes where each cluster is formed by different types of nodes (e.g., they could be classified by the sensed parameter using different transmitting interfaces, by the node profile or by the type of device: laptops, PDAs, sensor etc.) and exclusive networks, as virtual networks, are needed with the same type of sensed data, or the same type of devices, or even the same type of profiles. In this paper, we propose an algorithm that is able to structure the topology of different wireless sensor networks to coexist in the same environment. It allows control and management of the topology of each network. The architecture operation and the protocol messages will be described. Measurements from a real test-bench will show that the designed protocol has low bandwidth consumption and also demonstrates the viability and the scalability of the proposed architecture. Our ccluster-based algorithm is compared with other algorithms reported in the literature in terms of architecture and protocol measurements.

Real Deployments of Wireless Sensor Networks

Abstract: Sensor networks are becoming one of the most used technologies in our lives. Although there are several surveys about sensor networks, almost all of them focus on theoretical basis with little simulations. Some of the studies only explain where these kinds of networks can be useful, without details on how can they be applied. This paper classifies the applications of wireless sensor networks and describes real implementations. The target is to complement the existing surveys, by presenting details on real implementations in order to understand how these networks run, and how they are designed, maintained and operated.

Practical Deployments of Wireless Sensor Networks: a Survey

Abstract: Sensor networks are becoming one of the most used technologies in our lives. Although there are several surveys about sensor networks, almost all of them focus on theoretical basis with little simulations. Some studies only explain where this kind of networks can be used, without details on how they can be applied. This paper classifies applications of wireless sensor networks and describes real implementations. There is not any survey like the one presented in this paper. The target is to complement the existing surveys, by presenting details on real implementations in order to understand how these networks run, and how they are designed, maintained and operated.

Wireless Sensor Network Applications: A Study in Environment Monitoring System

Abstract: Development in the technology of sensor such as Micro Electro Mechanical Systems (MEMS), wireless communications, embedded systems, distributed processing and wireless sensor applications have contributed a large transformation in Wireless Sensor Network (WSN) recently. It assists and improves work performance both in the field of industry and our daily life. Wireless Sensor Network has been widely used in many areas especially for surveillance and monitoring in agriculture and habitat monitoring. Environment monitoring has become an important field of control and protection, providing real-time system and control communication with the physical world. An intelligent and smart Wireless Sensor Network system can gather and process a large amount of data from the beginning of the monitoring and manage air quality, the conditions of traffic, to weather situations. In this paper, we discuss and review wireless sensor network applications for environmental monitoring. In order to implement a good monitoring system, there are several requirements to be followed. From the studies, it has been proved to be an alternative way to replace the conventional method that uses men force to monitor the environment. It is also proven that these approaches can improve the system performance, provide a convenient and efficient method and can also fulfill functional requirements.

A wireless sensor network deployment for rural and forest fire detection and verification.

Abstract: Forest and rural fires are one of the main causes of environmental degradation in Mediterranean countries. Existing fire detection systems only focus on detection, but not on the verification of the fire. However, almost all of them are just simulations, and very few implementations can be found. Besides, the systems in the literature lack scalability. In this paper we show all the steps followed to perform the design, research and development of a wireless multisensor network which mixes sensors with IP cameras in a wireless network in order to detect and verify fire in rural and forest areas of Spain. We have studied how many cameras, sensors and access points are needed to cover a rural or forest area, and the scalability of the system. We have developed a multisensor and when it detects a fire, it sends a sensor alarm through the wireless network to a central server. The central server selects the closest wireless cameras to the multisensor, based on a software application, which are rotated to the sensor that raised the alarm, and sends them a message in order to receive real-time images from the zone. The camera lets the fire fighters corroborate the existence of a fire and avoid false alarms. In this paper, we show the test performance given by a test bench formed by four wireless IP cameras in several situations and the energy consumed when they are transmitting. Moreover, we study the energy consumed by each device when the system is set up. The wireless sensor network could be connected to Internet through a gateway and the images of the cameras could be seen from any part of the world.

A Review on Forest Fire Detection Techniques

Abstract: Context. Apart from causing tragic loss of lives and valuable natural and individual properties including thousands of hectares of forest and hundreds of houses, forest fires are a great menace to ecologically healthy grown forests and protection of the environment. Every year, thousands of forest fires across the globe cause disasters beyond measure and description. This issue has been the research interest for many years; there are a huge amount of very well studied solutions available out there for testing or even ready for use to resolve this problem. Aim. This work will summarise all the technologies that have been used for forest fire detection with exhaustive surveys of their techniques/methods used in this application. Methods. A lot of methods and systems are available in the market and for research. The paper reviews all the methods and discusses examples of research experiment results and some market product methods for better understanding. Result. Each technique has its own advantages and disadvantages. A full discussions provided after each type. Conclusion. A full table is provided at the end to summarise a comparison between the four methods.