The Experts below are selected from a list of 3972 Experts worldwide ranked by ideXlab platform

Gerardo Aranguren - One of the best experts on this subject based on the ideXlab platform.

  • Low Power Multi-Hop Networking Analysis in Intelligent Environments
    2017
    Co-Authors: J. Etxaniz, Gerardo Aranguren
    Abstract:

    Intelligent systems are driven by the latest technological advances in so different areas as sensing, embedded systems, wireless communications or context recognition. This paper focuses on some of those areas. Concretely, the paper deals with wireless communications issues on embedded systems. More precisely, the paper combines the multi-hop networking with Bluetooth technology and a quality of service (QoS) metric, the latency. Bluetooth is a Radio License free worldwide communication standard that makes low power multi-hop wireless networking available. It establishes piconets (point-to-point and point-to-multipoint links) and scatternets (multi-hop networks). As a result, many Bluetooth nodes can be interconnected to set up ambient intelligent networks. Then, this paper presents the results of the investigation on multi-hop latency with park and sniff Bluetooth low power modes conducted over the hardware test bench previously implemented. In addition, the empirical models to estimate the latency of multi-hop communications over Bluetooth Asynchronous Connectionless Links (ACL) in park and sniff mode are given. The designers of devices and networks for intelligent systems will benefit from the estimation of the latency in Bluetooth multi-hop communications that the models provide.

  • Bluetooth low power modes applied to the data transportation network in home automation systems
    Sensors (Switzerland), 2017
    Co-Authors: J. Etxaniz, Gerardo Aranguren
    Abstract:

    Even though home automation is a well-known research and development area, recent technological improvements in different areas such as context recognition, sensing, wireless communications or embedded systems have boosted wireless smart homes. This paper focuses on some of those areas related to home automation. The paper draws attention to wireless communications issues on embedded systems. Specifically, the paper discusses the multi-hop networking together with Bluetooth technology and latency, as a quality of service (QoS) metric. Bluetooth is a worldwide standard that provides low power multi-hop networking. It is a Radio License free technology and establishes point-to-point and point-to-multipoint links, known as piconets, or multi-hop networks, known as scatternets. This way, many Bluetooth nodes can be interconnected to deploy ambient intelligent networks. This paper introduces the research on multi-hop latency done with park and sniff low power modes of Bluetooth over the test platform developed. Besides, an empirical model is obtained to calculate the latency of Bluetooth multi-hop communications over asynchronous links when links in scatternets are always in sniff or the park mode. Smart home devices and networks designers would take advantage of the models and the estimation of the delay they provide in communications along Bluetooth multi-hop networks.

  • Analysis of the data transportation multi-hop network for an intelligent environment
    Journal of Ambient Intelligence and Smart Environments, 2016
    Co-Authors: J. Etxaniz, Gerardo Aranguren, Manuel Mazzara
    Abstract:

    The recent advent of ambient intelligence is enabled by parallel technological advancements in sensing, context recognition, embedded systems and communications. This paper focuses on the communication issues of embedded systems, particularly the latency Quality of Service (QoS) metric and the multi-hop communications with Bluetooth standard, to examine the viability of communications of embedded systems in AmI environments and applications. Bluetooth is a worldwide Radio License-free technology that enables the creation of low-power multi-hop networks interconnecting multiple devices. Bluetooth sets the procedure to establish piconets (point-to-point and point-to-multipoint links) and scatternets (multi-hop communications), and hence, Bluetooth nodes can be interconnected to form wireless networks. This paper presents research on multi-hop latency that was conducted using a custom-built test platform. Moreover, an empirical model is derived to calculate the latency over asynchronous links when links in scatternets are always active or in sniff mode. The designers of ambient intelligent devices and networks can take advantage of the model and the estimation of the delay in Bluetooth multi-hop networks presented in this paper.

J. Etxaniz - One of the best experts on this subject based on the ideXlab platform.

  • Low Power Multi-Hop Networking Analysis in Intelligent Environments
    2017
    Co-Authors: J. Etxaniz, Gerardo Aranguren
    Abstract:

    Intelligent systems are driven by the latest technological advances in so different areas as sensing, embedded systems, wireless communications or context recognition. This paper focuses on some of those areas. Concretely, the paper deals with wireless communications issues on embedded systems. More precisely, the paper combines the multi-hop networking with Bluetooth technology and a quality of service (QoS) metric, the latency. Bluetooth is a Radio License free worldwide communication standard that makes low power multi-hop wireless networking available. It establishes piconets (point-to-point and point-to-multipoint links) and scatternets (multi-hop networks). As a result, many Bluetooth nodes can be interconnected to set up ambient intelligent networks. Then, this paper presents the results of the investigation on multi-hop latency with park and sniff Bluetooth low power modes conducted over the hardware test bench previously implemented. In addition, the empirical models to estimate the latency of multi-hop communications over Bluetooth Asynchronous Connectionless Links (ACL) in park and sniff mode are given. The designers of devices and networks for intelligent systems will benefit from the estimation of the latency in Bluetooth multi-hop communications that the models provide.

  • Bluetooth low power modes applied to the data transportation network in home automation systems
    Sensors (Switzerland), 2017
    Co-Authors: J. Etxaniz, Gerardo Aranguren
    Abstract:

    Even though home automation is a well-known research and development area, recent technological improvements in different areas such as context recognition, sensing, wireless communications or embedded systems have boosted wireless smart homes. This paper focuses on some of those areas related to home automation. The paper draws attention to wireless communications issues on embedded systems. Specifically, the paper discusses the multi-hop networking together with Bluetooth technology and latency, as a quality of service (QoS) metric. Bluetooth is a worldwide standard that provides low power multi-hop networking. It is a Radio License free technology and establishes point-to-point and point-to-multipoint links, known as piconets, or multi-hop networks, known as scatternets. This way, many Bluetooth nodes can be interconnected to deploy ambient intelligent networks. This paper introduces the research on multi-hop latency done with park and sniff low power modes of Bluetooth over the test platform developed. Besides, an empirical model is obtained to calculate the latency of Bluetooth multi-hop communications over asynchronous links when links in scatternets are always in sniff or the park mode. Smart home devices and networks designers would take advantage of the models and the estimation of the delay they provide in communications along Bluetooth multi-hop networks.

  • Analysis of the data transportation multi-hop network for an intelligent environment
    Journal of Ambient Intelligence and Smart Environments, 2016
    Co-Authors: J. Etxaniz, Gerardo Aranguren, Manuel Mazzara
    Abstract:

    The recent advent of ambient intelligence is enabled by parallel technological advancements in sensing, context recognition, embedded systems and communications. This paper focuses on the communication issues of embedded systems, particularly the latency Quality of Service (QoS) metric and the multi-hop communications with Bluetooth standard, to examine the viability of communications of embedded systems in AmI environments and applications. Bluetooth is a worldwide Radio License-free technology that enables the creation of low-power multi-hop networks interconnecting multiple devices. Bluetooth sets the procedure to establish piconets (point-to-point and point-to-multipoint links) and scatternets (multi-hop communications), and hence, Bluetooth nodes can be interconnected to form wireless networks. This paper presents research on multi-hop latency that was conducted using a custom-built test platform. Moreover, an empirical model is derived to calculate the latency over asynchronous links when links in scatternets are always active or in sniff mode. The designers of ambient intelligent devices and networks can take advantage of the model and the estimation of the delay in Bluetooth multi-hop networks presented in this paper.

Manuel Mazzara - One of the best experts on this subject based on the ideXlab platform.

  • Analysis of the data transportation multi-hop network for an intelligent environment
    Journal of Ambient Intelligence and Smart Environments, 2016
    Co-Authors: J. Etxaniz, Gerardo Aranguren, Manuel Mazzara
    Abstract:

    The recent advent of ambient intelligence is enabled by parallel technological advancements in sensing, context recognition, embedded systems and communications. This paper focuses on the communication issues of embedded systems, particularly the latency Quality of Service (QoS) metric and the multi-hop communications with Bluetooth standard, to examine the viability of communications of embedded systems in AmI environments and applications. Bluetooth is a worldwide Radio License-free technology that enables the creation of low-power multi-hop networks interconnecting multiple devices. Bluetooth sets the procedure to establish piconets (point-to-point and point-to-multipoint links) and scatternets (multi-hop communications), and hence, Bluetooth nodes can be interconnected to form wireless networks. This paper presents research on multi-hop latency that was conducted using a custom-built test platform. Moreover, an empirical model is derived to calculate the latency over asynchronous links when links in scatternets are always active or in sniff mode. The designers of ambient intelligent devices and networks can take advantage of the model and the estimation of the delay in Bluetooth multi-hop networks presented in this paper.

Francisco Gavilan - One of the best experts on this subject based on the ideXlab platform.

  • Development of an Emergency Radio Beacon for Small Unmanned Aerial Vehicles
    IEEE Access, 2018
    Co-Authors: J. Martinez-heredia, Zulema Garcia, Jose Luis Mora-jimenez, Sergio Esteban, Francisco Gavilan
    Abstract:

    Emergency locator transmitters (ELTs) used to locate manned aircrafts are not well suited to find and recover small crashed unmanned aerial vehicles (UAVs). ELTs utilize an international satellite system for search and rescue (Cospas-Sarsat System), which should leverage its expensive resources to save lives as a priority. Besides, ELTs are too big and heavy to be used within small UAVs. Some of the existing solutions for this problem are based on receivers that detect signal strength, which may be a long and tedious process not suitable for user needs. Others do not have enough range or require Radio License and expensive amateur Radio receivers. This paper presents an emergency Radio beacon specifically designed to locate small UAVs. It is triggered automatically in the event of a crash and allows finding and recovering a crashed UAV in a fast and simple way. It meets not only the required specifications of user-friendliness, size and weight of this kind of application, but also it is a high precision and low cost device. Besides, it has enough range and endurance. The experiments carried out show the operation of the proposed system.

F. Daniel Hidalgo - One of the best experts on this subject based on the ideXlab platform.

  • Controlling the Airwaves: Incumbency Advantage and Community Radio in Brazil
    American Journal of Political Science, 2011
    Co-Authors: Taylor C. Boas, F. Daniel Hidalgo
    Abstract:

    Direct influence over communication media is a potent resource during electoral campaigns, and politicians have an incentive to gain control of the airwaves to advance their careers. In this article, we use data on community Radio License applications in Brazil to identify both the causal effect of incumbency on politicians’ ability to control the media and the causal effect of media control on their future electoral prospects. Using a regression discontinuity design, we compare city council candidates who barely won or barely lost an election, showing that incumbency more than doubles the probability of an application’s approval by the Ministry of Communications. Next, using genetic matching, we compare candidates who acquired community Radio Licenses before an election to similar politicians who did not, showing that a Radio station substantially increases one’s vote share and probability of victory. These findings demonstrate that media control helps entrench local political power in Brazil.