Search results for "rection"

showing 10 items of 965 documents

'L'ADAMO, OVVERO IL MONDO CREATO' DI TOMMASO CAMPAILLA. UN CONTRIBUTO AL RINNOVAMENTO DELLA CULTURA SCIENTIFICA E LETTERARIA IN SICILIA

2022

L’articolo analizza L’Adamo, ovvero il Mondo creato, poema scientifico-filosofico di Tommaso Campailla (1668-1740), accademico modicano, che partecipò con i suoi esperimenti scientifici e la sua opera letteraria a diffondere la filosofia cartesiana e le nuove mirabili scoperte in ogni campo del sapere. Nel poema Campailla ricorre al motivo tradizionale del viaggio di conoscenza per squadernare al Primo Uomo, Adamo, le straordinarie meraviglie della creazione, tentando una sintesi tra istanze scientifiche e nuove direttrici della poesia settecentesca.

Settore L-FIL-LET/10 - Letteratura ItalianaThe article analyzes L'Adamo ovvero il Mondo creato a scientific-philosophical poem by Tommaso Campailla (1668-1740) a Modican academic who participated with his scientific experiments and his literary work to spread the Cartesian philosophy and the new wonderful discoveries in every field of knowledge. In his poem Campailla he uses the traditional motif of the journey of knowledge to square the extraordinary wonders of creation to the First Man Adam attempting a synthesis between scientific instances and new directions of eighteenth-century poetry.

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Ancora sulle "esplosive palatali" nelle inchieste dell'Atlante Linguistico del Mediterraneo (ALM): i punti albanesi

2021

Tra i «Problemi redazionali» emersi in fase di controllo e organizzazione dei materiali giunti dalla campagna di rilevamenti dell’Atlante Linguistico del Mediterraneo (ALM), Berruto (1971-1973) rileva la proliferazione e l’eterogeneità di alcune scelte grafemiche operate da diversi raccoglitori che, impegnati in una trascrizione più o meno puntuale delle risposte ottenute, avevano interpretato e risolto variamente alcune delle indicazioni previste nel sistema di trascrizione fonetica che accompagnava il Questionario. Particolarmente complesso era emerso il quadro relativo alla trascrizione di alcune consonanti del settore “palatale”, per le quali i grafemi (e i foni a essi corrispondenti) p…

Settore L-FIL-LET/12 - Linguistica ItalianaAmong the «Editorial problems» that emerged during the control and organization of the materials coming from the survey campaign of the Atlante Linguistico del Mediterraneo (ALM) Berruto (1971-1973) notes the proliferation and heterogeneity of some graphemic choices made by different field researchers. As they were engaged in a more or less punctual transcription of the answers obtained they had interpreted and solved differently some of the directions provided in the phonetic transcription system that accompanied the Questionnaire. The picture relating to the transcription of some consonants of the palatal sector had emerged as particularly complex since the graphemes (and the corresponding phones) foreseen in the original system (ALM 1959) were insufficient. Not even the 1971 updates meant to improve the representation of some phonetic features emerged from the investigations in the operations of Response reviewing allowed to obtain a clear homogeneous picture regarding the «plosive palatal» consonants. With regard to the phonetic trait under scrutiny I have already had the opportunity to propose a path aiming to the achievement of possible operational solutions. This has taken place in view of the planned simplification / homologation and transcoding phase from the ALM original system to the IPA one - while proceeding from the examination of the Schedoni’s current state with regard to the surveys referring to central-southern Italy Corsica and Sicily (see Matranga 2019). The scope is now to investigate the same phonetic trait as proven in the materials about the surveys carried out by Lirak Dodbiba in the ALM’s three Albanian points.

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Oral and Vaginal Epithelial Cell Lines Bind and Transfer Cell-Free Infectious HIV-1 to Permissive Cells but Are Not Productively Infected

2014

The majority of HIV-1 infections worldwide are acquired via mucosal surfaces. However, unlike the vaginal mucosa, the issue of whether the oral mucosa can act as a portal of entry for HIV-1 infection remains controversial. To address potential differences with regard to the fate of HIV-1 after exposure to oral and vaginal epithelium, we utilized two epithelial cell lines representative of buccal (TR146) and pharyngeal (FaDu) sites of the oral cavity and compared them with a cell line derived from vaginal epithelium (A431) in order to determine (i) HIV-1 receptor gene and protein expression, (ii) whether HIV-1 genome integration into epithelial cells occurs, (iii) whether productive viral in…

Sexual transmissionTranscription GeneticVirus IntegrationScienceReceptors Cell SurfaceGenome ViralBiologyMicrobiologyCXCR4EpitheliumVirusCell LineFlow cytometryViral ProteinsImmunodeficiency VirusesmedicineHumansRNA MessengerOral mucosaMicrobial PathogensMultidisciplinarymedicine.diagnostic_testQMouth MucosaRBiology and Life SciencesHIVCorrectionEpithelial CellsVirologyMolecular biologyEpitheliumBiological Tissuemedicine.anatomical_structureGene Expression RegulationTranscytosisMedical MicrobiologyCell cultureViral PathogensDNA ViralVaginaHIV-1MedicineFemaleAnatomyResearch Article

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Interaction of accretion shocks with winds

2002

Accretion shocks are known to oscillate in presence of cooling processes in the disk. This oscillation may also cause quasi-periodic oscillations of black holes. In the presence of strong winds, these shocks have oscillations in vertical direction as well. We show examples of shock oscillations under the influence of both the effects. When the shocks are absent and the flow is cooler, the wind becomes weaker and the vertical oscillation becomes negligible.

Shock wavePhysicsSpace and Planetary ScienceOscillationAstrophysics::High Energy Astrophysical PhenomenaVertical directionAstrophysics::Solar and Stellar AstrophysicsAstronomy and AstrophysicsAstrophysicsAstrophysics::Galaxy AstrophysicsAccretion (astrophysics)Journal of Astrophysics and Astronomy

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Fast Channel Estimation in the Transformed Spatial Domain for Analog Millimeter Wave Systems

2021

Fast channel estimation in millimeter-wave (mmWave) systems is a fundamental enabler of high-gain beamforming, which boosts coverage and capacity. The channel estimation stage typically involves an initial beam training process where a subset of the possible beam directions at the transmitter and receiver is scanned along a predefined codebook. Unfortunately, the high number of transmit and receive antennas deployed in mmWave systems increase the complexity of the beam selection and channel estimation tasks. In this work, we tackle the channel estimation problem in analog systems from a different perspective than used by previous works. In particular, we propose to move the channel estimati…

Signal Processing (eess.SP)FOS: Computer and information sciencesBeamformingComputational complexity theoryComputer scienceComputer Science - Information TheoryInformation Theory (cs.IT)Applied MathematicsTransmitterCodebookDirection of arrivalComputer Science ApplicationsTelecomunicaciósymbols.namesakeAdditive white Gaussian noiseTecnologiaRobustness (computer science)FOS: Electrical engineering electronic engineering information engineeringsymbolsElectrical Engineering and Systems Science - Signal ProcessingElectrical and Electronic EngineeringAlgorithmComputer Science::Information TheoryCommunication channelIEEE Transactions on Wireless Communications

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A fluorescence retrieval method for the flex sentinel-3 tandem mission

2014

A new fluorescence retrieval method is proposed to support ESA's 8th Earth Explorer Fluorescence EXplorer (FLEX) candidate mission. Most hyperspectral fluorescence retrieval algorithms available in the literature are very sensitive to true reflectance modelization and/or they assume the atmospheric status as known. The proposed algorithm delivers the retrieval of full fluorescence spectrum at canopy level by using only Top Of Atmosphere (TOA) radiances as input. The proposed method starts with (1) the atmospheric correction of TOA radiances, characterizing the state of the atmosphere without assuming any a-priori classification on aerosols models, (2) performing a first estimation of fluore…

Signal processingComputer sciencesynergy productFluorescence retrievalAtmospheric correctionHyperspectral imagingAtmospheric modelFluorescenceFLEXAtmosphereAtmospheric correctionSentinel-3Adaptive opticsAbsorption (electromagnetic radiation)Remote sensing2014 6th Workshop on Hyperspectral Image and Signal Processing: Evolution in Remote Sensing (WHISPERS)

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Nonparametric statistics for DOA estimation in the presence of multipath

2002

This paper is concerned with array signal processing in nonGaussian noise and in the presence of multipath. Robust and fully nonparametric high resolution algorithms for direction of arrival (DOA) estimation are presented. The algorithms are based on multivariate spatial sign and rank concepts. Spatial smoothing of the multivariate rank and sign based covariance matrices is employed as a preprocessing step in order to deal with coherent sources. The performance of the algorithms is studied using simulations. The results show that almost optimal performance is obtained in wide variety of different noise conditions.

Signal processingRank (linear algebra)business.industryNoise (signal processing)Nonparametric statisticsDirection of arrivalPattern recognitionArtificial intelligenceCovariancebusinessSmoothingMultipath propagationMathematicsProceedings of the 2000 IEEE Sensor Array and Multichannel Signal Processing Workshop. SAM 2000 (Cat. No.00EX410)

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Robust subspace DOA estimation for wireless communications

2002

This paper is concerned with array signal processing in non-Gaussian noise typical in urban and indoor radio channels. Robust and fully nonparametric high resolution algorithms for direction of arrival (DOA) estimation are presented. The algorithms are based on multivariate spatial sign and rank concepts. The performance of the algorithms is studied using simulations. The results show that almost optimal performance is obtained in wide variety of noise conditions.

Signal processingbusiness.industryNoise (signal processing)Covariance matrixElectronic engineeringNonparametric statisticsWirelessDirection of arrivalbusinessAlgorithmSubspace topologyMathematicsMatrix decompositionVTC2000-Spring. 2000 IEEE 51st Vehicular Technology Conference Proceedings (Cat. No.00CH37026)

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Accuracy of an Affordable Smartphone-Based Teledermoscopy System for Color Measurements in Canine Skin

2020

Quality smartphone cameras and affordable dermatoscopes have enabled teledermoscopy to become a popular medical and veterinary tool for analyzing skin lesions such as melanoma and erythema. However, smartphones acquire images in an unknown RGB color space, which prevents a standardized colorimetric skin analysis. In this work, we supplemented a typical veterinary teledermoscopy system with a conventional color calibration procedure, and we studied two mid-priced smartphones in evaluating native and erythematous canine skin color. In a laboratory setting with the ColorChecker, the teledermoscopy system reached CIELAB-based color differences &Delta

Skin erythemaErythemaComputer scienceHuman skinlcsh:Chemical technology01 natural sciencesBiochemistryAnalytical Chemistry0403 veterinary sciencecolor correctionColorCheckererythema indexlcsh:TP1-1185Computer visionDog Diseasessmartphone teledermoscopycanine skincolor calibrationColorimetryMelanomaInstrumentationSkincolorcheckerColor calibrationintegumentary systemColor constancyColor correction04 agricultural and veterinary sciencesAtomic and Molecular Physics and OpticsCIELAB color spaceRGB color spaceSmartphonemedicine.symptomcolor constancySkin lesion040301 veterinary sciencesColorDermoscopyArticle010309 opticsDogs0103 physical sciencesmedicineAnimalsHumansElectrical and Electronic Engineeringcolor calibration targetbusiness.industryveterinary dermatologyErythemaSkin colorArtificial intelligencebusinessSensors

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Microphones’ Directivity for the Localization of Sound Sources

2011

In a recent paper [P. Rizzo, G. Bordoni, A. Marzani, and J. Vipperman, "Localization of Sound Sources by Means of Unidirectional Microphones, Meas. Sci. Tech., 20, 055202 (12pp), 2009] the proof-of-concept of an approach for the localization of acoustic sources was presented. The method relies on the use of unidirectional microphones and amplitude-based signals' features to extract information about the direction of the incoming sound. By intersecting the directions identified by a pair of microphones, the position of the emitting source can be identified. In this paper we expand the work presented previously by assessing the effectiveness of the approach for the localization of an acoustic…

Sound localizationunidirectional microphonesound source localization; unidirectional microphones; polar directivity pattern; feature extraction; timedelay estimate.timedelay estimate.Anechoic chamberComputer scienceAcousticsfeature extractionFeature extractionDetectorpolar directivity patternAcoustic source localizationDirectivityExpression (mathematics)sound source localizationPosition (vector)

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