119 research outputs found
Mechanical modeling of bend sensors exploited to measure human joint movements
No full textFlexibility, lightness, wearability and cheapness are the most important features for a successful adoption of bend sensors, being they fundamental elements to realize systems able to convert static positions and movements into electrical signals. Even though these sensors have been employed for many different applications, the focal aspect of their mechanical modeling is still not adequately considered. For such a reason the aim of this paper is to fill a lack concerning the method of bend sensors mechanical characterization and modeling. The results have been exploited to realize an instrumented glove able to measure finger joints movements
Advanced characterization of piezoresistive sensors for human body movement tracking
No full textDue to their pliability, sensitivity and cheapness, piezoresistive sensors can be usefully adopted to recover joint bend angles in human body movement tracking. After providing quasi-static and dynamic electrical characterization of piezoresistive sensors, the authors develop a simple and accurate RLC model fitted on sensor electrical response under fast deformation and relaxation movements, which allows to predict the actual device behavior in tracking body fast movements
Attempt to Voltage Distribution on Armature Winding of Asynchronous Motors fed by Static Converters
No full textAttempt to Voltage Distribution on Armature Winding of Asynchrnous Motors Fed by Static Converters
No full textAttempt to Voltage Distribution on Armature Winding of Asynchrnous Motors Fed by Static Converters
No full textAttempt to Voltage Distribution on Armature Winding of Asynchronous Motors fed by Static Converters
No full textATTEMPT TO VOLTAGE DISTRIBUTION ON ARMATURE WINDING OF ASYNCHRONOUS MOTORS FED BY STATIC CONVERTERS
No full textSurgical management and prognostic factors of hilar cholongiocarcinoma: experience with 68 patients at the Ghent university Hospital
No full textFrom may 1992 to december 2006, 68 patients with Klatskin tumor were evaluated in our institution. Clinicopathological data were analyzed and univariate and multivariate analyses carriede out to determine significant prognostic factors affecting morbidity and mortality. Mean age was of 53,4+/-12 years. M/F ratio was of 46/22. After a median FU of 28 months (1-84), 11/68 (16%) of patients were non respectable (group A) and treated with palliative transtumoral stenting. The others 57 patients (group B) underwent surgery : n=5 for BYsmuth type II; n=20 for type IIIa; n=23 for type IIIb and n=9 for type IV. Median survival was of 6 months in non resected patients vs. 32 months in group B (p = 0,001). R0 resection was achived in 41/57 (72%) patients. Median survival was of 48 m in R0 vs. 10 m in R1-2 resection (p = 0,003). In-hospital mortality was of 3.5%. Overall morbidity rate was of 3.5%. Factors related to a shorter survival were identified as: Lymphatic and perineural invasiveness, R1-2 resection, AJCC stage, overall 3 & 5 y patient survival was of 45% and 22% respectively. Surgical approach for Klatskin tumor is the only chance for long-term survival with acceptable surgical mortality rate. In our experience, radical oncological surgery was possible in more than 70% of cases leading to a significant survival. Perineural and lymphatic involvement combined to a R1-R2 resection correlated with shorter survival
Wireless data glove system developed for HMI
No full textA simple PC screen can be considered as an interface of a virtual environment where an user can move objects and interact with them. The interaction tools can be simply a virtual mouse or a keyboard. But it is evident how these tools cannot provide an immersive experience since the bi-dimensionality of the screen. So in the latter years the virtual reality is becoming more and more accomplished by new hardware interfaces capable to increase the realism degree. Among all, the sensorized glove is becoming one of the more interesting and promising of these interfaces. Here we propose the electronic interface and signal conditioning circuitry we adopt as the most suitable for our developed data glove system
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