The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Mobile robots are nowadays used in a wide variety of missions especially for exploring environments and allowing scientists who study these environments to gather data about them. However the monolithic design of control laws is often a hindrance to adapting control solutions from a robotic application to another. We thus propose a new control description paradigm strongly focused on modularity as...
We introduce a new approach for the investigation of multipolar selective neural stimulation. We aim at comparing existing solutions from the literature and innovate in this field with advanced strategies. We have developed a multichannel stimulator, Stim'ND, which allows us to control independently the parameters of complex stimulation profiles of 12 channels for a large number of stimulating current...
Functional electrical stimulation (FES) is a useful technique for restoring motor functions for spinal cord injured (SCI) patients. Muscle contractions can be artificially driven through delivery of electrical pulses to impaired muscles, and the electrical activity of contracted muscles under stimulus recorded by electromyography (EMG) is called M-wave. The FES-induced muscle activation which is represented...
Activation mapping using electroanatomical mapping (EAM) systems helps to guide catheter ablation treatment of common arrhythmias. In focal tachycardias, the earliest activation area becomes the ablation target. Recently, we proposed a single-point wavelet-based algorithm to automatically identify electrogram (EGM) activation onsets for activation mapping. In this work, we propose an EGM morphology-based...
Vagus nerve stimulation (VNS) is a potential therapeutic approach in a number of clinical applications. Although VNS is commonly delivered in an open-loop approach, it is now recognized that closed-loop approaches may be necessary to optimize the therapy and minimize side effects of neuro-stimulation devices. In this paper, we describe a prototype system for real-time control of the instantaneous...
Several solutions for implementing Petri net models on FPGA thanks to a transformation in a VHDL code have been proposed in literature. But none deals with the management of transition conflicts in the specific case of synchronous implementation of interpreted Petri nets. This article presents an automatic method to deal with conflicts from their detection to their implementation on FPGA. One solution...
Karst groundwaters provide fresh water resources to supply cities. In the case of deep groundwater resources around the Mediterranean basin there is a need to explore karst aquifers and gather data about their structure. Robots are well adapted for this task especially when exploring karst conduits at depths greater than 200m. However, as karst aquifers environment is very complex, robots need to...
Identification of the earliest activation area is a common task in focal tachycardia catheter ablation treatments. In these procedures the detection of the electrogram (EGM) activation onset during electroanatomical mapping (EAM) helps to define the ablation target area. However, EAM systems do not automatically detect the EGM activation onset and this is currently done manually in clinical routine,...
Electroanatomical maps (EAM) are currently used to visualize electrical activation patterns jointly with the patient's anatomy. However, they are intrinsically specific to each subject and suffer from the lack of a common space of coordinates in which intra- and inter-subject comparisons can be performed. We propose a method for mapping this EAM surface-based information to a common geometry (using...
This paper describes the architecture of the functional electrical stimulation systems developed in the context of the TIME European project. Contributions are the definition of a generic FES architecture and the specialization of this architecture, depending on the applicative context, by the deployment, the programming and the control of hardware units, notably stimulation ones. This specialization...
This paper presents a bladder model including detrusor and sphincter dynamics. The model focuses on artificially controlled bladder contractions under Electrical Stimulation. We developed a smooth muscle model linked to a geometrical description of the bladder. In order to illustrate the model performances, we simulate a well known example: the behavior of the bladder under electrical stimulation...
The need to operate in deep water and perform simultaneously several scientific tasks, leads AUV software control to be designed with modularity and evolutionarity aims. A software control architecture applied to the AUV TAIPAN is presented. It focuses on dynamic scheduling of tasks and instrumentation
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.