Multipartite entanglement detection for hypergraph states

We study the entanglement properties of quantum hypergraph states of $n$ qubits, focusing on multipartite entanglement. We compute multipartite entanglement for hypergraph states with a single hyperedge of maximum cardinality, for hypergraph states endowed with all possible hyperedges of cardinality equal to $n-1$ and for those hypergraph states with all possible hyperedges of cardinality greater than or equal to $n-1$. We then find a lower bound to the multipartite entanglement of a generic quantum hypergraph state. We finally apply the multipartite entanglement results to the construction of entanglement witness operators, able to detect genuine multipartite entanglement in the neighbourhood of a given hypergraph state. We first build entanglement witnesses of the projective type, then propose a class of witnesses based on the stabilizer formalism, hence called stabilizer witnesses, able to reduce the experimental effort from an exponential to a linear growth in the number of local measurement settings with the number of qubits

Chronic pain assessments in children and adolescents : a systematic literature review of the selection, administration, interpretation, and reporting of unidimensional pain intensity scales

Background. Advances in pain assessment approaches now indicate which measures should be used to capture chronic pain experiences in children and adolescents. However, there is little guidance on how these tools should best be administered and reported, such as which time frames to use or how pain scores are categorised as mild, moderate, or severe. Objective. To synthesise current evidence on unidimensional, single-item pain intensity scale selection, administration, interpretation, and reporting. Methods. Databases were searched (inception: 18 January 2016) for studies in which unidimensional pain intensity assessments were used with children and adolescents with chronic pain. Ten quality criteria were developed by modifying existing recommendations to evaluate the quality of administration of pain scales most commonly used with children. Results. Forty-six studies met the inclusion criteria. The highest score achieved was 7 out of a possible 10 (median: 5; IQR: 4–6). Usage of scales varied markedly in administrator/completer, highest anchors, number of successive assessments, and time referent periods used. Conclusions. Findings suggest these scales are selected, administered, and interpreted inconsistently, even in studies of the same type. Furthermore, methods of administration are rarely reported or justified making it impossible to compare findings across studies. This article concludes by recommending criteria for the future reporting of paediatric chronic pain assessments in studies

Human activity recognition on smartphones using a multiclass hardware-friendly support vector machine

Activity-Based Computing aims to capture the state of the user and its environment by exploiting heterogeneous sensors in order to provide adaptation to exogenous computing resources. When these sensors are attached to the subject’s body, they permit continuous monitoring of numerous physiological signals. This has appealing use in healthcare applications, e.g. the exploitation of Ambient Intelligence (AmI) in daily activity monitoring for elderly people. In this paper, we present a system for human physical Activity Recognition (AR) using smartphone inertial sensors. As these mobile phones are limited in terms of energy and computing power, we propose a novel hardware-friendly approach for multiclass classification. This method adapts the standard Support Vector Machine (SVM) and exploits fixed-point arithmetic for computational cost reduction. A comparison with the traditional SVM shows a significant improvement in terms of computational costs while maintaining similar accuracy, which can contribute to develop more sustainable systems for AmI.Peer ReviewedPostprint (author's final draft

Caractéristiques de la dynamique d'un Pneumotachographe pour l'étude de la production de la parole : aspects acoustiques et aérodynamique.

International audienceThe measure of aerodynamic parameters in the study of the articulatory mechanisms of speech production poses many problems. Some of them are not solved today. To measure oral and nasal airflow, a certain number of conditions must be met. In this aim, we designed and built a pneumotachograph with particular care to optimise its response time, linearity and acoustical response. This flow meter is based on the grid flow meter principle with a small dead volume and specific linearisation for the inhaled and exhaled airflow. A soft silicone rubber mask, pressed against the speaker's face prevents air leakage, without hindering articulatory movements. The acoustical distortions of the speech sound through the device are remedied by an adapted signal processing from its transfer function.La mesure de paramètres aérodynamiques dans l'étude des mécanismes articulatoires dans la production de parole pose de nombreux problèmes. Certains d'entre eux ne sont pas définitivement résolus. Pour mesurer le flux d'air oral et nasal, un certain nombre de conditions doivent être réunies. Dans ce but, nous avons réalisé un pneumotachographe conçu avec un soin particulier pour optimiser son temps de réponse, sa linéarité et sa distorsion acoustique. Ce capteur de débit utilise une grille résistive et possède un faible volume mort. Un masque en caoutchouc de silicone mou, appuyé contre le visage du locuteur empêche la fuite d'air, sans gêner les mouvements articulatoires. Les déformations acoustiques engendrées le dispositif sont atténuées par un traitement des signaux adapté de sa fonction de transfert

Caractéristiques de la dynamique d'un Pneumotachographe pour l'étude de la production de la parole : aspects acoustiques et aérodynamique.

International audienceThe measure of aerodynamic parameters in the study of the articulatory mechanisms of speech production poses many problems. Some of them are not solved today. To measure oral and nasal airflow, a certain number of conditions must be met. In this aim, we designed and built a pneumotachograph with particular care to optimise its response time, linearity and acoustical response. This flow meter is based on the grid flow meter principle with a small dead volume and specific linearisation for the inhaled and exhaled airflow. A soft silicone rubber mask, pressed against the speaker's face prevents air leakage, without hindering articulatory movements. The acoustical distortions of the speech sound through the device are remedied by an adapted signal processing from its transfer function.La mesure de paramètres aérodynamiques dans l'étude des mécanismes articulatoires dans la production de parole pose de nombreux problèmes. Certains d'entre eux ne sont pas définitivement résolus. Pour mesurer le flux d'air oral et nasal, un certain nombre de conditions doivent être réunies. Dans ce but, nous avons réalisé un pneumotachographe conçu avec un soin particulier pour optimiser son temps de réponse, sa linéarité et sa distorsion acoustique. Ce capteur de débit utilise une grille résistive et possède un faible volume mort. Un masque en caoutchouc de silicone mou, appuyé contre le visage du locuteur empêche la fuite d'air, sans gêner les mouvements articulatoires. Les déformations acoustiques engendrées le dispositif sont atténuées par un traitement des signaux adapté de sa fonction de transfert

Evaluation of the acoustic and aerodynamic constraints of a pneumotachograph for speech and voice studies

International audienceTo measure oral and nasal airflow during speech production, several conditions must be gathered. In this aim, we designed and built a pneumotachograph with particular care to optimise its response time, linearity and acoustical response. This flow meter is based on the grid flow meter principle with a small dead volume and specific linearization for the inhaled and exhaled airflow. A soft silicone rubber mask, pressed against the speaker's face prevents air leakage, without hindering articulatory movements. The acoustical distortions of the speech sound through the device are remedied by an adapted signal processing from its transfer function

Ancore antiche: origine ed evoluzione.

Questa ricerca vuole contribuire ad offrire una panoramica, quanto più completa, sull'origine e l'evoluzione delle ancore, offrendo una classificazione tipologica e cronologica attraverso la descrizione delle fondamentali caratteristiche fisiche che permettono di individuare specifiche categorie di appartenenza. Il primo capito è dedicato alla nascita delle primordiali ancore litiche a gravità, analizzando le ancore “a rocchetto” e “a ciambella”, le pietre forate, i killicks e i primi ceppi litici. Nel secondo capitolo l'attenzione si sposta sulla nascita e la diffusione delle ancore a presa, distinguibili attraverso il tipo di materiale utilizzato (legno, piombo e ferro) e attraverso il tipo di ceppo (mobile o fisso). Vengono menzionate, per concludere, le tipologie di ancore “a presa” particolari e quelle moderne. Per ogni classe analizzata vengono forniti una descrizione delle principali caratteristiche, una possibile datazione del periodo di utilizzo e alcuni esempi di ritrovamenti di particolare interesse o riferibili a contesti databili. È stata dedicata attenzione all'analisi dell'ancora nei suoi aspetti decorativi, con particolare riferimento al ceppo d'ancora del Museo Civico di Rosignano Marittimo (Livorno). Il terzo capitolo è dedicato al territorio pisano e all'analisi delle due ancore ritrovate negli scavi del Cantiere delle Navi Antiche di Pisa, è stata elaborata una scheda con le misure e le caratteristiche strutturali delle ancore ed è stata proposta una possibile datazione attraverso lo studio del contesto di ritrovamento e il confronto con manufatti con caratteristiche simili e databili con maggiore sicurezza. Uno dei principali problemi riscontrati durante lo svolgimento di questa ricerca è quello relativo alla nomenclatura da utilizzare per distinguere le parti costituenti l'ancora; a tal proposito, sono stati inseriti una descrizione per quanto concerne la terminologia utilizzata ed un glossario comparativo dei termini principali in inglese, francese e spagnolo incontrati durante la ricerca

Diezmos y producción agraria. Buenos Aires, 1750-1800

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PERCEVAL

La station PERCEVAL permet de tester jusqu'à 16 sujets simultanément. Elle a été développée pour répondre à la grande demande de test d'intelligibilité.Conçue autour d'un PC dans l'environnement WINDOWS, elle permet de répondre rapidement à des contrats (C. Cavé et al).ANDRÉ, C.; GHIO, A.; CAVÉ, C.; TESTON, B. PERCEVAL: a Computer-Driven System for Experimentation on Auditory and Visual Perception. Proceedings of XVth ICPhS (2003 August 3-9 : Barcelona, Spain). 2003, p.1421-1424.http://hal.archives-ouvertes.fr/hal-00142980GHIO, A.; ANDRÉ, C.; TESTON, B.; CAVÉ, C. PERCEVAL: une station automatisée de tests de PERCeption et d'EVALuation auditive et visuelle. Travaux Interdisciplinaires du Laboratoire Parole et Langage d'Aix-en-Provence (TIPA), vol. 22. 2003, p. 115-133. ISSN 1621-0360.http://hal.archives-ouvertes.fr/hal-0013419