Search results for "LESS"

showing 10 items of 2452 documents

Advanced Monitoring Systems Based on Battery-Less Asset Tracking Modules Energized through RF Wireless Power Transfer

2020

Asset tracking involving accurate location and transportation data is highly suited to wireless sensor networks (WSNs) featuring battery-less nodes that can be deployed in virtually any environment and require little or no maintenance. In response to the growing demand for advanced battery-less sensor tag solutions, this article presents a system for identifying and monitoring the speeds of assets in a WSN with battery-less tags that receive all their operating energy through radio frequency (RF) wireless power transfer (WPT) architecture, and a unique measurement approach to generate time-domain speed readouts. The assessment includes performance characteristics and key features of a syste…

Internet of thingsMaximum power principleComputer scienceAsset tracking02 engineering and technologylcsh:Chemical technologywsnSettore ING-INF/01 - Elettronica01 natural sciencesBiochemistryArticleAnalytical Chemistrywireless sensor networkRadio frequency0202 electrical engineering electronic engineering information engineeringElectronic engineeringlcsh:TP1-1185System on a chipWireless power transferWireless power transferElectrical and Electronic EngineeringInstrumentationwsnsEnergy harvesting010401 analytical chemistryEnergy conversion efficiencyWireless battery charger020206 networking & telecommunicationsWireless sensor networksAtomic and Molecular Physics and Optics0104 chemical sciencesSettore ING-IND/31 - ElettrotecnicawptNode (circuits)Radio frequencyWireless sensor networkEnergy harvestingSensors
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Diagnosis and therapeutic management of primary headache in an emergency setting

2013

Introduction and aim: Much headachers are under or mis-diagnoses and data regarding the proportion of patients attending an emergency department (ED) because of headache are still few. We conducted a retrospective observational study in an ED with the following aims: (a) estimate the proportion of headache attending to an ED (b) to estimate and describe the therapeutic management of primary headache and (c) to assessment the exam most frequently requested. Materials and methods: We collected data regarding patients diagnosed with headache consecutively attending the ED of the University of Palermo between September 2011 and March 2012. The study was approved by the ethics committee. Results: Between the semester evaluated 25110 subjects were admitted to ED headache suffers were equal to 1.6 %. Of these 263 (63.1 %) were woman and 154 (36.9 %). Mean age was 44.2 (DS ± 18.4) years (p = 0.068).According to ED registry headache admission was as follow assigned: 76.5 % with a diagnosis of headache 22.8 % with a secondary headache 0.7 % with Trigeminal Autonomic Cephalgias (TACs). Among those with a primary headache about 36 % of patient did not received a pharmacological treatment. Monotherapy was prescribed less frequently than combination therapy (19.1 vs 44.5 %).In monotherapy the most frequent medication were NSAIDs (28.3 %) benzodiazepines (26.7 %) and dopamine antagonists (11.7 %). Among those with a primary headache a CT scan was performed in the 124 subjects and 111 (34.8 %) had a neurologist consultation. Discussion: Our data are in line with the one previously reported in literature. The most frequently medication in the Italian ED were NSAIDs benzodiazepines dopamine antagonists and steroids. Neverless our data unlikely can be compared to other study give a snapshot. We believe that much more can be done to improve treatment of primary headache in ED.Settore MED/26 - Neurologia
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Development of a Low-Cost IoT System for Lightning Strike Detection and Location

2019

Lightning and thunder are some of the most violent natural phenomena. They generate a great deal of expenditure and economic loss, especially when they strike in cities. The identification of the concrete geographic area where they strike is of critical importance for emergency services in order to enhance their effectiveness by doing an intensive coverage of the affected area. To achieve this purpose at the city scale, this paper proposes the design, prototype, and validation of a distributed network of Internet of Things (IoT) devices. The IoT devices are empowered with lightning detection capabilities and are synchronized with the other devices in the sensor network. All of them cooperat…

IoTComputer Networks and CommunicationsComputer scienceLightning (connector)Real-time computing0211 other engineering and technologies02 engineering and technology01 natural scienceslaw.inventionlaw0103 physical sciencesElectrical and Electronic Engineering010306 general physicsLightning detection021110 strategic defence & security studiesThunderLightningsensor designLightning strikeHardware and ArchitectureControl and Systems EngineeringSignal Processinglightning detection and locationTrilaterationWireless sensor networkFIWAREElectronics
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A data aggregation strategy based on wavelet for the internet of things

2017

The advent of emerging information and communication technologies, such as RFID, small size sensors and sensor networks, has made accessible a huge amount of information that requires sophisticated and efficient search algorithms to support queries on that data. In this paper we focus on the problem of aggregating data collected from these devices to efficiently support queries, inferences or statistics on them. In general, data aggregation techniques are necessary to efficiently collect information in a compact and cost-effective way. Some current solutions try to meet the above criteria, by exploiting different data aggregation techniques, for instance BitVector or Q_Digest. In this manus…

IoTExploitRange query (data structures)Computer science0102 computer and information sciences02 engineering and technologyFog Computingcomputer.software_genre01 natural sciencesWaveletSoftwareSearch algorithmHistogramComputational Theory and Mathematic0202 electrical engineering electronic engineering information engineeringP2PSettore INF/01 - Informaticabusiness.industry020206 networking & telecommunicationsData aggregation; Fog Computing; IoT; P2P; Range query; WaveletData aggregationData aggregator010201 computation theory & mathematicsComputational MathematicRange queryData miningbusinesscomputerWireless sensor networkWaveletSoftware
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Exploratory approach for network behavior clustering in LoRaWAN

2021

AbstractThe interest in the Internet of Things (IoT) is increasing both as for research and market perspectives. Worldwide, we are witnessing the deployment of several IoT networks for different applications, spanning from home automation to smart cities. The majority of these IoT deployments were quickly set up with the aim of providing connectivity without deeply engineering the infrastructure to optimize the network efficiency and scalability. The interest is now moving towards the analysis of the behavior of such systems in order to characterize and improve their functionality. In these IoT systems, many data related to device and human interactions are stored in databases, as well as I…

IoTGeneral Computer ScienceComputer sciencek-meansReliability (computer networking)02 engineering and technologyLoRaMachine LearningHome automation0202 electrical engineering electronic engineering information engineeringCluster AnalysisWirelessCluster analysisIoT LoRa LoRaWAN Machine Learning k-means Anomaly Detection Cluster AnalysisNetwork packetbusiness.industry020206 networking & telecommunicationsIoT; LoRa; LoRaWAN; Machine Learning; k-means; Anomaly Detection; Cluster AnalysisLoRaWANWireless network interface controllerScalabilityAnomaly Detection020201 artificial intelligence & image processingAnomaly detectionbusinessComputer networkJournal of Ambient Intelligence and Humanized Computing
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Demo - A Cell-level Traffic Generator for LoRa Networks

2017

In this demo we present and validate a LoRa cell traffic generator, able to emulate the behavior of thousands of low-rate sensor nodes deployed in the same cell, by using a single Software Defined Radio (SDR) platform. Differently from traditional generators, whose goal is creating packet flows which emulate specific applications and protocols, our focus is generating a combined radio signal, as seen by a gateway, given by the super-position of the signals transmitted by multiple sensors simultaneously active on the same channel. We argue that such a generator can be of interest for testing different network planning solutions for LoRa networks.

IoTGenerator (computer programming)cell emulatorSettore ING-INF/03 - TelecomunicazioniComputer sciencebusiness.industryNetwork packet05 social sciences020206 networking & telecommunications02 engineering and technologySoftware-defined radioLoRaLoRaWANNetwork planning and designDefault gateway0502 economics and business0202 electrical engineering electronic engineering information engineeringWirelessSDRbusinessTraffic generation model050203 business & managementComputer networkCommunication channelProceedings of the 23rd Annual International Conference on Mobile Computing and Networking - MobiCom 17
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Classification of Actual Sensor Network Deployments in Research Studies from 2013 to 2017

2020

Technologies, such as Wireless Sensor Networks (WSN) and Internet of Things (IoT), have captured the imagination of researchers, businesses, and general public, due to breakthroughs in embedded system development, sensing technologies, and ubiquitous connectivity in recent years. That resulted in the emergence of an enormous, difficult-to-navigate body of work related to WSN and IoT. In an ongoing research effort to highlight trends and developments in these technologies and to see whether they are actually deployed rather than subjects of theoretical research with presumed potential use cases, we gathered and codified a dataset of scientific publications from a five-year period from 2013 t…

IoTInformation Systems and ManagementComputer sciencebusiness.industryReal-time computingScopusreviewData scienceWork relatedWSNField (computer science)lcsh:ZComputer Science Applicationslcsh:Bibliography. Library science. Information resourcesSoftware deploymentelectrical_electronic_engineeringResearch studiesdeploymentUse caseInternet of ThingsbusinessWireless sensor networkPublicationInformation SystemsData
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Demo abstract: Cross-technology TDMA synchronization using energy pattern beacons

2017

When different technologies use the same frequency bands in close proximity, the resulting interference typically results in performance degradation. Coexistence methods exist, but these are often technology specific and require technology specific interference detection methods. To remove the root cause of the performance degradation, devices should be able to negotiate medium access even when using different technologies. To this end, an architecture that allows cross-technology medium access by means of a Time Division Multiple Access (TDMA) scheme was devised. In order to achieve cross-technology synchronization, which is required for the TDMA solution, an energy pattern beacon is trans…

IoTbusiness.industryComputer scienceWiFiComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKSTestbedReal-time computingTime division multiple access020206 networking & telecommunicationsThroughput02 engineering and technologyInterference (wave propagation)01 natural sciencesBeacon010309 opticsZigBee0103 physical sciencesSynchronization (computer science)0202 electrical engineering electronic engineering information engineeringWirelessIntertecnology interferenceIBCNbusinessWireless sensor network2017 IEEE Conference on Computer Communications Workshops (INFOCOM WKSHPS)
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Internet of Things : Wireless Technologies in Home Automation Solutions

2015

Esineiden internet on kasvava ala ja kotiautomaatioratkaisut ovat todennäköi-sesti kuluttajien ensimmäisiä kosketuksia tämänlaiseen teknologiaan. Radiotaa-juusteknologiat ovat olennainen osa sensoriverkkoa ja tällä hetkellä moni tek-nologia pyrkii olemaan standardi kotiautomaatiossa. Kotiautomaatio liiketoi-mintana tulee kasvamaan voimakkaasti tulevina vuosina ja kehittyneillä senso-riverkoilla pelkästään kotona mahdollisuudet ovat suuret. Tässä tutkielmassa esitellään neljä teknologiaa: Wi-Fi, ZigBee, Z-wave ja Bluetooth. Teknologioiden pääpiirteet on selitetty ja esitetty olemassa olevien tuotteiden kautta. Olen käyttänyt SWOT–analyysiä tuotteisiin ja niitä tuottaviin yrityksiin saadaksen…

IoTwirelessInternet of Thingshome automationradio frequency
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NOVEL TOOLS FOR THE MECHANICAL ANALYSIS OF THIN PLATES AND RELEVANCE ON MEMBRANE-BASED TECHNOLOGIES

2020

Ion Exchange MembraneSettore ING-IND/26 - Teoria Dello Sviluppo Dei Processi ChimiciProfiled MembraneFluid-Structure InteractionThin PlateMembraneMembrane DeformationReverse ElectrodialysiElectrodialysiMeshfree methodLine Element-Less MethodMaterial parameter identificationFluid redistribution.Settore ICAR/08 - Scienza Delle Costruzioni
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