Search results for "WAN"

showing 10 items of 854 documents

Wannier90 as a community code: new features and applications

2019

Wannier90 is an open-source computer program for calculating maximally-localised Wannier functions (MLWFs) from a set of Bloch states. It is interfaced to many widely used electronic-structure codes thanks to its independence from the basis sets representing these Bloch states. In the past few years the development of Wannier90 has transitioned to a community-driven model; this has resulted in a number of new developments that have been recently released in Wannier90 v3.0. In this article we describe these new functionalities, that include the implementation of new features for wannierisation and disentanglement (symmetry-adapted Wannier functions, selectively-localised Wannier functions, s…

Interface (Java)02 engineering and technologysemiconductors01 natural sciencesGeneral Materials Sciencefieldslocal orbitalCondensed Matter - Materials ScienceUnit testingComputer programBasis (linear algebra)electronstooldynamicsComputational Physics (physics.comp-ph)021001 nanoscience & nanotechnologyCondensed Matter Physicsspin polarizationreal-space methods[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]0210 nano-technologyPhysics - Computational PhysicspseudopotentialsconstructionMaterials sciencelocal orbitalsFluids & Plasmasreal-space method0204 Condensed Matter PhysicsFOS: Physical sciencesComputational sciencecrystalSet (abstract data type)band structure interpolation0103 physical sciencesddc:530Wannier function010306 general physics0912 Materials Engineeringdensity-functional theoryWannier orbitalWannier function1007 Nanotechnologybusiness.industrywannier orbitalsMaterials Science (cond-mat.mtrl-sci)Usabilitywannier functionsWannier functions; band structure interpolation; local orbitals; real-space methods; electronic structure; Wannier orbitals; density-functional theoryelectronic structureAutomationtotal-energy calculationsbusiness
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A Coexistence Study of Low-Power Wide-Area Networks based on LoRaWAN and Sigfox

2023

According to IoT Analytics, NB-IoT, LoRaWAN, and Sigfox are today the most popular technologies for low-power wide-area networks (86% of the market), both in terms of end-user adoption as well as ecosystem support. While NB-IoT utilizes licensed bands, LoRaWAN and Sigfox both employ the sub-GHz ISM bands, potentially interfering with each other.In this paper, we present a thorough coexistence study between LoRaWAN and Sigfox, in realistic urban scenarios, with different duty cycles and traffic conditions. The choice of such scenarios and simulation parameters are supported by an in-depth lit-erature review, and simulations are based on the SEAMCAT simulator. The results offer new insights o…

Interference SEAMCAT LPWAN IoT ISM LoRaWAN LoRa Sigfox Coexistence CSS UNB2023 IEEE Wireless Communications and Networking Conference (WCNC)
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AI for Resource Allocation and Resource Allocation for AI: a two-fold paradigm at the network edge

2022

5G-and-beyond and Internet of Things (IoT) technologies are pushing a shift from the classic cloud-centric view of the network to a new edge-centric vision. In such a perspective, the computation, communication and storage resources are moved closer to the user, to the benefit of network responsiveness/latency, and of an improved context-awareness, that is, the ability to tailor the network services to the live user's experience. However, these improvements do not come for free: edge networks are highly constrained, and do not match the resource abundance of their cloud counterparts. In such a perspective, the proper management of the few available resources is of crucial importance to impr…

Internet Of ThingMINLPIoTEdge NetworkPerformance EvaluationLow Power Wide Area NetworkSystem ModelingSettore ING-INF/03 - TelecomunicazioniUAVSoftware Defined RadioReal TestbedVehicular NetworkMLLoRaReinforcement LearningResource AllocationMachine LearningGame TheoryArtificial IntelligenceAILPWANColosseum Channel EmulatorChannel EmulationEmulationSDR
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Integrating psychological and neurobiological considerations regarding the development and maintenance of specific Internet-use disorders: An Interac…

2016

Within the last two decades, many studies have addressed the clinical phenomenon of Internet-use disorders, with a particular focus on Internet-gaming disorder. Based on previous theoretical considerations and empirical findings, we suggest an Interaction of Person-Affect-Cognition-Execution (I-PACE) model of specific Internet-use disorders. The I-PACE model is a theoretical framework for the processes underlying the development and maintenance of an addictive use of certain Internet applications or sites promoting gaming, gambling, pornography viewing, shopping, or communication. The model is composed as a process model. Specific Internet-use disorders are considered to be the consequence …

Internet addictionProcess (engineering)Cognitive Neurosciencemedia_common.quotation_subjectCue-reactivityAffect (psychology)Executive functions03 medical and health sciencesBehavioral NeuroscienceCognition0302 clinical medicineddc:150Internet-use disordersHumansPornographySituational ethicsInhibitory controlInternet-gaming disordermedia_commonInternetbusiness.industryAddictionCognitionKognition [Fakultät für Ingenieurwissenschaften » Informatik und Angewandte Kognitionswissenschaft » Angewandte Kognitions- und Medienwissenschaft » Allgemeine Psychologie]Cognitive biasForschungszentren » Erwin L. Hahn Institute for Resonance Imaging030227 psychiatryBehavior AddictiveNeuropsychology and Physiological PsychologyVideo Gamesddc:15PsychologieGamblingThe InternetbusinessPsychologySocial psychology030217 neurology & neurosurgeryCognitive psychologyNeuroscience & Biobehavioral Reviews
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Internet a zachowania zakupowe nabywców

2016

W rozdziale podjęto próbę wykazania roli Internetu w procesie decyzyjnym klienta. Internet i informacje w nim zawarte wpływają na każdy etap decyzyjny, a opinie i rekomendacje użytkowników często wpływają na zakup produktu lub jego zaniechanie. W rozważaniach wskazano na fakt, że permanentne informowanie się klientów i wzajemne polecanie lub odradzanie produktów stworzyło potrzebę redefinicji klasycznego procesu decyzyjnego i poszerzenia go o tzw. zerowy moment prawdy. Stopień dominacji Internetu w procesie decyzyjnym pokazany został również na przykładzie badań ankietowych.

Internetproces podejmowania decyzji zakupuzachowania nabywcze
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Idea świętości i miłosierdzia - Św. Józef Sebastian Pelczar w perspektywie Roku Miłosierdzia

2016

Interpretacja Pisma Świętegoświęcimiłosierdzienowa ewangelizacjawzorzec osobowyZeszyty Formacji Katechetów
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Tear production and intraocular pressure values in clinically normal eyes of whooper swans (<i>Cygnus cygnus</i>)

2018

The objective of this study was to determine the normal range of tear production and values of intraocular pressure (IOP) in clinically normal eyes of whooper swans (Cygnus cygnus). A total of 86 birds: 81 cygnets (6-10 weeks old) and 5 moulting - adult swans (3-6 years old) were examined in this study. Both eyes of all birds underwent a complete ophthalmic examination, including evaluation of tear production with the phenol red thread test (PRTT) and the assessment of the IOP by rebound tonometry, employing the TonoVet® device. The mean ± standard deviation of PRTT values were as follows: all cygnets (81) 22.59±3.48 mm/15s, male cygnets (45) 22.64±3.54 mm/15s, female cygnets (36) 22.53±3.4…

Intraocular pressuremedicine.medical_specialtygenetic structuresGeneral VeterinarybiologyOphthalmic examination040301 veterinary sciencesbusiness.industry0402 animal and dairy science04 agricultural and veterinary sciencesREBOUND TONOMETRYbiology.organism_classification040201 dairy & animal scienceeye diseasesTear production0403 veterinary scienceLeft eyeWhooper swanReference valuesOphthalmologymedicinesense organsbusinessNormal rangeOpen Veterinary Journal
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Predicting lorawan behavior. How machine learning can help

2020

Large scale deployments of Internet of Things (IoT) networks are becoming reality. From a technology perspective, a lot of information related to device parameters, channel states, network and application data are stored in databases and can be used for an extensive analysis to improve the functionality of IoT systems in terms of network performance and user services. LoRaWAN (Long Range Wide Area Network) is one of the emerging IoT technologies, with a simple protocol based on LoRa modulation. In this work, we discuss how machine learning approaches can be used to improve network performance (and if and how they can help). To this aim, we describe a methodology to process LoRaWAN packets a…

IoTComputer Networks and CommunicationsComputer scienceDecision treeChannel occupancy; cluster analysis; IoT; LoRa; LoRaWAN; machine learning; network optimization; prediction analysisMachine learningcomputer.software_genreChannel occupancyLoRalcsh:QA75.5-76.95network optimizationNetwork performanceProtocol (object-oriented programming)Profiling (computer programming)Artificial neural networkNetwork packetbusiness.industrySettore ING-INF/03 - TelecomunicazioniPipeline (software)LoRaWANHuman-Computer Interactionmachine learningprediction analysisArtificial intelligencelcsh:Electronic computers. Computer sciencebusinesscomputerCommunication channelcluster analysis
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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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