Search results for "complex"

showing 10 items of 5889 documents

A Novel Expert System for Non-Invasive Liver Iron Overload Estimation in Thalassemic Patients

2014

Expert Systems can integrate logic based often on computational intelligence methods and they are used in complex problem solving. In this work an Expert System for classifying liver iron concentration in thalassemic patients is presented. In this work, an ANN is used to validate the output of the L.I.O.MO.T (Liver Iron Overload Monitoring in Thalassemia) method against the output of the state-of-the-art method based on MRI T2 assessment for liver iron concentration. The model has been validated with a dataset of 200 samples. The experimental Mean Squared Error results and Correlation show interesting performances. The proposed algorithm has been developed as a plug in for OsiriX Dicom View…

Settore ING-INF/05 - Sistemi Di Elaborazione Delle InformazioniLiver Iron ConcentrationMean squared errorArtificial neural networkComputer scienceRemote patient monitoringbusiness.industryComputational intelligenceComplex problem solvingcomputer.software_genreExpert systemLIOMOT MRI T2* Iron Liver Thalassemia Artificial Neural Network Expert System OsiriXLiver ironArtificial intelligenceData miningbusinesscomputer
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Color and Timbre Gestures: An Approach with Bicategories and Bigroupoids

2022

White light can be decomposed into different colors, and a complex sound wave can be decomposed into its partials. While the physics behind transverse and longitudinal waves is quite different and several theories have been developed to investigate the complexity of colors and timbres, we can try to model their structural similarities through the language of categories. Then, we consider color mixing and color transition in painting, comparing them with timbre superposition and timbre morphing in orchestration and computer music in light of bicategories and bigroupoids. Colors and timbres can be a probe to investigate some relevant aspects of visual and auditory perception jointly with thei…

Settore ING-INF/05 - Sistemi Di Elaborazione Delle InformazioniSettore MAT/02 - Algebracross-modal correspondences; equivalence classes; category theory; bicategories; complexitySettore INF/01 - InformaticaGeneral MathematicsComputer Science (miscellaneous)Bicategories Category theory Complexity Cross-modal correspondences Equivalence classesSettore MAT/04 - Matematiche ComplementariEngineering (miscellaneous)Mathematics; Volume 10; Issue 4; Pages: 663
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Abelian antipowers in infinite words

2019

Abstract An abelian antipower of order k (or simply an abelian k-antipower) is a concatenation of k consecutive words of the same length having pairwise distinct Parikh vectors. This definition generalizes to the abelian setting the notion of a k-antipower, as introduced in Fici et al. (2018) [7] , that is a concatenation of k pairwise distinct words of the same length. We aim to study whether a word contains abelian k-antipowers for arbitrarily large k. S. Holub proved that all paperfolding words contain abelian powers of every order (Holub, 2013 [8] ). We show that they also contain abelian antipowers of every order.

Settore ING-INF/05 - Sistemi Di Elaborazione Delle InformazioniSierpiǹski wordSettore INF/01 - InformaticaApplied MathematicsConcatenationAbelian complexityCombinatoricsArbitrarily largeOrder (group theory)Pairwise comparisonk-antipowerAbelian groupPaperfolding wordComputer Science::Formal Languages and Automata TheoryWord (group theory)Abelian antipowerMathematicsAdvances in Applied Mathematics
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Real-Time Body Gestures Recognition Using Training Set Constrained Reduction

2017

Gesture recognition is an emerging cross-discipline research field, which aims at interpreting human gestures and associating them to a well-defined meaning. It has been used as a mean for supporting human to machine interaction in several applications of robotics, artificial intelligence, and machine learning. In this paper, we propose a system able to recognize human body gestures which implements a constrained training set reduction technique. This allows the system for a real-time execution. The system has been tested on a publicly available dataset of 7,000 gestures, and experimental results have highlighted that at the cost of a little decrease in the maximum achievable recognition ac…

Settore ING-INF/05 - Sistemi Di Elaborazione Delle InformazioniTraining setComputer sciencebusiness.industrySpeech recognitionRoboticsGesture Recognition Real-time systems Constrained optimizationField (computer science)Reduction (complexity)Gesture recognitionArtificial intelligencebusinessGestureMeaning (linguistics)
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Adaptive distributed outlier detection for WSNs.

2014

The paradigm of pervasive computing is gaining more and more attention nowadays, thanks to the possibility of obtaining precise and continuous monitoring. Ease of deployment and adaptivity are typically implemented by adopting autonomous and cooperative sensory devices; however, for such systems to be of any practical use, reliability and fault tolerance must be guaranteed, for instance by detecting corrupted readings amidst the huge amount of gathered sensory data. This paper proposes an adaptive distributed Bayesian approach for detecting outliers in data collected by a wireless sensor network; our algorithm aims at optimizing classification accuracy, time complexity and communication com…

Settore ING-INF/05 - Sistemi Di Elaborazione Delle InformazioniUbiquitous computingComputer scienceReal-time computingFault toleranceEnergy consumptionWSNComputer Science ApplicationsOutlier Detection.Human-Computer InteractionKey distribution in wireless sensor networksControl and Systems EngineeringBayesian NetworkOutlierAnomaly detectionElectrical and Electronic EngineeringCommunication complexityWireless sensor networkTime complexitySoftwareInformation SystemsIEEE transactions on cybernetics
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Multimodal Mean Adaptive Backgrounding for Embedded Real-Time Video Surveillance

2007

Automated video surveillance applications require accurate separation of foreground and background image content. Cost sensitive embedded platforms place realtime performance and efficiency demands on techniques to accomplish this task. In this paper we evaluate pixel-level foreground extraction techniques for a low cost integrated surveillance system. We introduce a new adaptive technique, multimodal mean (MM), which balances accuracy, performance, and efficiency to meet embedded system requirements. Our evaluation compares several pixel-level foreground extraction techniques in terms of their computation and storage requirements, and functional accuracy for three representative video sequ…

Settore ING-INF/05 - Sistemi Di Elaborazione Delle Informazionibusiness.industryComputer scienceReal-time computingComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISIONMixture modelReduction (complexity)TRACKINGReal time videoTask (computing)BackgroundingComputer visionArtificial intelligencebusiness2007 IEEE Conference on Computer Vision and Pattern Recognition
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Feasibility of Ultra-short Term Complexity Analysis of Heart Rate Variability in Resting State and During Orthostatic Stress

2022

In this work, we study ultra-short term (UST) complexity of Heart Rate Variability (HRV) and its agreement with analysis of standard short-term (ST) HRV recordings obtained at rest and during orthostatic stress. Conditional Entropy (CE) measures have been computed using both a linear Gaussian approximation and a more accurate model-free approach based on nearest neighbors. The agreement between UST and ST indices has been compared via statistical tests and correlation analysis, suggesting the feasibility of exploiting faster algorithms and shorter time series for detecting changes in cardiovascular control during various states.

Settore ING-INF/06 - Bioingegneria Elettronica E InformaticaTime series analysis Stochastic processes Complexity theory Heart rate variability StressSettore ING-INF/01 - Elettronica2022 12th Conference of the European Study Group on Cardiovascular Oscillations (ESGCO)
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Prospettive di riforma della tutela penale dell'ambiente nel diritto europeo e sovranazionale

2021

Il saggio descrive le prospettive di riforma della normativa penale ambientale, di recente delineatesi tanto a livello internazionale, quanto in ambito europeo. Pur non spingendosi sino a prevedere i possibili esiti delle dinamiche in corso, il contributo non rinuncia ad analizzarne luci ed ombre, anche alla luce delle difficoltà di tipizzazione delle fattispecie incriminatrici determinata dalla particolare complessità della materia ambientale.

Settore IUS/17 - Diritto PenaleThe essay describes the prospects of reform of environmental criminal law recently outlined both at international and European level. Although the contribution does not go so far as to predict the possible outcomes of the dynamics in progress it does not shy away from analysing the lights and shadows also in the light of the difficulties of typifying criminal offences determined by the particular complexity of environmental matters.
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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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La Sicilia negli Orsi di Dino Buzzati e Lorenzo Mattotti

2022

Nella fiaba illustrata di Dino Buzzati La famosa invasione degli orsi in Sicilia (1945) e nella sua trasposizione filmica ad opera di Lorenzo Mattotti (2019) l’ambientazione siciliana è determinante. In entrambi i casi la Sicilia è un’isola con un grande vulcano – trasfigurata in un ambiente fantastico o riscritta secondo alcuni stereotipi – che i due autori utilizzano con accezioni diverse nella costituzione dell’ecosistema delle loro narrazioni. Soltanto attraverso una comparazione tra le due opere sarà possibile distinguere la rappresentazione delle due Sicilie che vengono raccontate con un intervallo di circa settanta anni. Se non si considera la storia degli Orsi soltanto una fiaba per…

Settore L-FIL-LET/14 - Critica Letteraria E Letterature ComparateSicily in Bears of Dino Buzzati and Lorenzo Mattotti · In Dino Buzzati’s illustrated fairy tale The Famous Invasion of the Bears in Sicily (1945) and its film adaptation by Lorenzo Mattotti (2019) the Sicilian setting is decisive. In both cases Sicily is an island with a large volcano – transfigured into a fantastic setting or rewritten according to certain stereotypes – that the two authors use with different meanings within the ecosystem of their narratives. Only through a comparison between the two works will it be possible to distinguish the representation of the two Sicilies which are narrated within an interval of about seventy years. If one does not consider the story of the Bears merely a children’s fairy tale using simplistic stylistic devices but on the contrary sees it as an opportunity for the author to deal with serious and complex issues such as an ante litteram Ecocritical perspective or questions of inter-group conflicts derived from Subaltern or Migration Studies the images of the two Sicilies can provide altogether new interpretations.
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