186,698 research outputs found
Calcium signalling in neuronal motility: pharmacological tools for investigating specific pathways
No full textObject Tracking with Adaptive HOG Detector and Adaptive Rao-Blackwellised Particle Filter
No full text
GDNF and bFGF are differentially involved in glial cell differentiation and neurite bundle formation in cultures from chick embryonic ciliary ganglia
No full textProgetto San Basilio di Ariano nel Polesine. Primi risultati delle ricerche 2019-2022
No full textsi espongono i primi risultati della ricerca nel sito greco-etrusco di San BAsilio di Ariano nel Polesine, nel quadro di uno studio sul Delta del P
Knowledge management for designing business workflows through semantic compositions of web services
No full textThis paper presents a workflow management system called task management system (TMS) devoted to help end users to combine and integrate distributed tasks through visual composition strategies. The TMS is devoted to support human resources in performing their working activities and in exploiting their knowledge and expertise. The TMS network allows employees, who are experts of a specific domain, to design a workflow, to visually validate its execution and to execute it at use time. In particular, the paper describes how workflow designers use TMS to transform the task analysis documents prepared by domain experts into a description of the workflow. The retrieved components are web services that are available in remote or local repositories representing distributed knowledge bases of business tasks. The TMS offers transparent invocation methods for invoking services by means of a semantic discovery engine designed for exploiting a taxonomy of web services
"A Tigre Negra": uma iluminogravura de Ariano Suassuna
No full textO soneto “A Tigre Negra” e a “iluminogravura” que o integra fazem parte do álbum Sonetos de Albano Cervonegro, de Ariano Suassuna (1985). Partindo de uma análise lingüística e literária do soneto, pretende-se chegar a uma leitura intersemiótica do conjunto texto/gravura, em busca do seu significado profundo, com base no cruzamento de três temas da literatura universal: Amor, Tempo e Morte. </p
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Quantifying Forearm Muscle Activity during Wrist and Finger Movements by Means of Multi-Channel Electromyography
No full textThe study of hand and finger movement is an important topic with applications in prosthetics, rehabilitation, and ergonomics. Surface electromyography (sEMG) is the gold standard for the analysis of muscle activation. Previous studies investigated the optimal electrode number and positioning on the forearm to obtain information representative of muscle activation and robust to movements. However, the sEMG spatial distribution on the forearm during hand and finger movements and its changes due to different hand positions has never been quantified. The aim of this work is to quantify 1) the spatial localization of surface EMG activity of distinct forearm muscles during dynamic free movements of wrist and single fingers and 2) the effect of hand position on sEMG activity distribution. The subjects performed cyclic dynamic tasks involving the wrist and the fingers. The wrist tasks and the hand opening/closing task were performed with the hand in prone and neutral positions. A sensorized glove was used for kinematics recording. sEMG signals were acquired from the forearm muscles using a grid of 112 electrodes integrated into a stretchable textile sleeve. The areas of sEMG activity have been identified by a segmentation technique after a data dimensionality reduction step based on Non Negative Matrix Factorization applied to the EMG envelopes. The results show that 1) it is possible to identify distinct areas of sEMG activity on the forearm for different fingers; 2) hand position influences sEMG activity level and spatial distribution. This work gives new quantitative information about sEMG activity distribution on the forearm in healthy subjects and provides a basis for future works on the identification of optimal electrode configuration for sEMG based control of prostheses, exoskeletons, or orthoses. An example of use of this information for the optimization of the detection system for the estimation of joint kinematics from sEMG is reporte
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