Search results for " key"

showing 10 items of 409 documents

Experimental Demonstration of 50-Mb/s Visible Light Communications Using 4<inline-formula> <tex-math notation="TeX">$\,\times\,$ </tex…

2014

This letter reports the experimental demonstration of an indoor visible light nonimaging multiple-input multiple-output system with an aggregate error free bit rate of 50 Mb/s over a distance of 2 m. The system uses four independent white LED transmitters, each transmitting 12.5 Mb/s of data in the ON-OFF keying nonreturn zero format, and four independent nonimaging optical receivers. The performance of four detection methods ranging from the basic channel inversion to the more advanced space time techniques is compared experimentally. The results gathered demonstrate that the simplest technique is capable of the same bit error rate as the most complex scheme. The system also provides full …

Engineeringbusiness.industryMIMOOptical communicationVisible light communicationKeyingRangingAtomic and Molecular Physics and OpticsAmplitude-shift keyingElectronic Optical and Magnetic Materialslaw.inventionlawBit error rateElectronic engineeringElectrical and Electronic EngineeringbusinessLight-emitting diodeIEEE Photonics Technology Letters
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Narrowband power line communications for medium voltage smart grids

2014

The aim of the paper is to show how narrowband power line communications (NB-PLCs) can be a valid solution for medium voltage grids. Advantages and drawbacks of this solution are analyzed, starting from some experimental communication results, which were carried out on the medium power system networks of the islands of Ustica and Favignana, in the presence of the net voltage. Furthermore, some communication architectures and hardware prototypes based on NB-PLCs are proposed for different smart grids applications.

Engineeringbusiness.industrypower system measurements communication systems power system communication communication equipment testing narrow band power line communication smart gridsElectrical engineeringcommunication equipment testing communication systems narrow band power line communication power system communication power system measurements smart gridsLine (electrical engineering)Power (physics)Electric power systemSmart gridNarrowbandElectronic engineeringbusinessSettore ING-INF/07 - Misure Elettriche E ElettronichePhase-shift keyingVoltage
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Development of a Coupling System for Medium Voltage Power Line Communication in the CENELEC A Frequency Band

2016

In this paper the performances of a new power line communication (PLC) coupling system for medium voltage (MV) smart grids are investigated in the CENELEC A frequency band (i.e. 3 - 95 kHz). The new coupling solution is based on the use of the capacitive divider of the voltage detecting system (VDS) as PLC coupler to the MV network. According to IEC 61243-5, VDS are worldwide used to reveal the presence of the mains voltage to ensure the safety of the operators. A proper interface circuit has been invented and patented to couple the PLC signal through the VDS. In this way no dedicated MV PLC coupler is required, thus avoiding the related costs of the coupler, of its installation, and those …

Engineeringpower system measurementFrequency band020209 energy02 engineering and technologyCapacitanceSignalCommunication systemspower system communication0202 electrical engineering electronic engineering information engineeringElectronic engineeringsmart gridscommunication signal couplersCouplingFrequency-shift keyingbusiness.industry020208 electrical & electronic engineeringElectrical engineeringnarrow band power line communicationpower system measurementsPower-line communicationSmart gridcommunication systemcommunication signal couplerbusinessSettore ING-INF/07 - Misure Elettriche E ElettronicheVoltage
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A case of squamocellular uterine cervix carcinoma metastatic to the skin with enterocutaneous fistula.

2006

Metastases to the skin complicated by enterocutaneous fistula are a rare event in gynecological malignancies. We present the case of a 70-year-old woman with uterine cervix carcinoma metastatic to the skin and treated with surgery and radiotherapy. The last relapse to the skin was complicated by the formation of an enterocutaneous fistula. This low-output fistula was treated with surgery and adequate supportive care. The treatment of enterocutaneous fistulas may be either invasive (surgical resection, surgical repair with corrective procedures or with myocutaneous flaps, colonic and/or urinary diversion, endoscopic treatments with metallic stents) or conservative (skin care and local disin…

Enterocutaneous fistulaCancer Researchmedicine.medical_specialtySkin Neoplasmsmedicine.medical_treatmentFistulaAuthor Keywords: enterocutaneous fistulaUterine Cervical NeoplasmsOctreotideIntestinal Fistulamedicineskin metastaseMANAGEMENTHumansuterine cervix carcinoma KeyWords Plus: SQUAMOUS-CELL CARCINOMAAgedSurgical repairPerformance statusIleal Diseasesbusiness.industryUterine Cervix CarcinomaUrinary diversionGeneral Medicinemedicine.diseaseCANCERSurgeryRadiation therapyOncologyCarcinoma Squamous CellFemalebusinessmedicine.drug
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Islands of biogeodiversity in arid lands on a polygons map study: Detecting scale invariance patterns from natural resources maps.

2016

Many maps (geology, hydrology, soil, vegetation, etc.) are created to inventory natural resources. Each of these resources is mapped using a unique set of criteria, including scales and taxonomies. Past research indicates that comparing results of related maps (e.g., soil and geology maps) may aid in identifying mapping deficiencies. Therefore, this study was undertaken in Almeria Province, Spain to (i) compare the underlying map structures of soil and vegetation maps and (ii) investigate if a vegetation map can provide useful soil information that was not shown on a soil map. Soil and vegetation maps were imported into ArcGIS 10.1 for spatial analysis, and results then exported to Microsof…

Environmental EngineeringSpatial pattern analysisBiodiversityGeographic Mapping010501 environmental sciences01 natural sciencesScale invarianceSoilNatural ResourcesEnvironmental ChemistryGeologíaEarth critical zoneWaste Management and DisposalArid lands0105 earth and related environmental sciences2. Zero hungerHydrologySoil mapInformáticaEphemeral keyVegetation maps04 agricultural and veterinary sciencesVegetationBiodiversity15. Life on landPlantsPollutionAridPower lawsGeographySpainDigital soil mappingSoil water040103 agronomy & agriculture0401 agriculture forestry and fisheriesRank abundance curvePhysical geographySoil mapsDesert ClimateThe Science of the total environment
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Ethernet FSO Communications Link Performance Study Under a Controlled Fog Environment

2012

In this letter the performance of a free space optical (FSO) communication link in the presence of fog is experimentally investigated in an indoor environment. A dedicated indoor atmospheric chamber, replicating the outdoor environment, is being used to evaluate the FSO link performance under the fog condition. Theoretical analysis supported by the experimental evaluation has been carried out for the intensity modulation/direct detection on-off keying non-return-to-zero (OOK-NRZ), OOK return-to-zero (OOK-RZ) and four pulse position modulation (4-PPM) modulation formats at the Ethernet baseline data-rate. The results shown indicate that the 4-PPM signalling scheme is the most robust to the f…

Ethernetbusiness.industryOptical linkKeyingXarxes locals sense fil Wi-FiAmplitude-shift keyingComputer Science ApplicationsTelecomunicacióModeling and SimulationPulse-position modulationElectronic engineeringBit error rateEnvironmental scienceElectrical and Electronic EngineeringTelecommunicationsbusinessIntensity modulationComunicació i tecnologiaFree-space optical communication
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A Proposed Access Control-Based Privacy Preservation Model to Share Healthcare Data in Cloud

2020

Healthcare data in cloud computing facilitates the treatment of patients efficiently by sharing information about personal health data between the healthcare providers for medical consultation. Furthermore, retaining the confidentiality of data and patients' identity is a another challenging task. This paper presents the concept of an access control-based (AC) privacy preservation model for the mutual authentication of users and data owners in the proposed digital system. The proposed model offers a high-security guarantee and high efficiency. The proposed digital system consists of four different entities, user, data owner, cloud server, and key generation center (KGC). This approach makes…

FOS: Computer and information sciencesKey generationComputer Science - Cryptography and Security020205 medical informaticsbusiness.industryComputer science020206 networking & telecommunicationsAccess controlCloud computing02 engineering and technologyMutual authenticationEncryptionPublic-key cryptographyData sharingComputer Science - Computers and SocietyComputers and Society (cs.CY)0202 electrical engineering electronic engineering information engineeringSession keybusinessCryptography and Security (cs.CR)Computer network2020 16th International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob)
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Trattamento dell'incertezza epistemica nell'analisi affidabilistica

Fault Tree AnalysiFuzzy TopsisAHPPropagazione dell'incertezzaSettore ING-IND/17 - Impianti Industriali MeccaniciIncertezza epistemicaMaintenance Key Performance Indicators (MKPI)Incertezza epistemica; Propagazione dell'incertezza; Fault Tree Analysis; Teoria della possibilità; Teoria di Dempster-Shafer; Manutenzione preventiva; Maintenance Key Performance Indicators (MKPI); AHP; Fuzzy TopsisTeoria di Dempster-ShaferTeoria della possibilitàManutenzione preventiva
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Investigation of design strategies and quantification of energy flexibility in buildings: A case-study in southern Italy

2021

Abstract The need for nearly (net) zero energy buildings in the current European landscape does not merely refer to energy balances: the aim to investigate the interaction between generation and load and find sources of technical-economic energy efficiency is marking the rise in interest throughout research and practice of energy flexibility solutions in buildings. In this regard, the study aims at enhancing the energy flexibility of a building in southern Italy through Rule-Based Control algorithms for the control of the space heating system and the charge and discharge of an electricity storage. The influence of electricity pricing and the thermal comfort conditions on flexibility is also…

Flexibility (engineering)Zero-energy buildingComputer scienceElectricity pricing0211 other engineering and technologiesBuilding model02 engineering and technologyBuilding and ConstructionTRNSYSEnvironmental economicsBuilding designEnergy storageEnergy flexible buildings Energy flexibility Rule based control Key performance indicatorsMechanics of Materials021105 building & constructionArchitecture021108 energySafety Risk Reliability and QualityCivil and Structural EngineeringEfficient energy useJournal of Building Engineering
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Energy consumption and improvement of energy efficiency for the European agricultural-food system

2020

This work addresses the subjects of reducing fossil energy consumption and the interventions to improve energy efficiency in the European agricultural-food sys-tem. Following an overview on both such subjects, the results of European projects TESLA and SCOoPE are also analysed with attention to best practices and technologies available to improve energy efficiency in order to reduce the fossil energy use in agri-food systems of Mediterranean countries. A list of Key Performance Indicators for the fruit and vegetable sector, useful for comparative analyses aimed at selecting best methods of energy management and technologies for improving energy efficiency, is reported. Finally, a brief focu…

Food industry agriculture energy efficiency energy consumption processing technologies Key Performance IndicatorRenewable Energy Sustainability and the EnvironmentAgriculturebusiness.industryStrategy and ManagementSettore AGR/09 - Meccanica AgrariaFood systemsEnergy consumptionManagement Monitoring Policy and LawDevelopmentbusinessAgricultural economicsEfficient energy use
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