In neurostimulation, wireless power transfer is an efficient technology to overcome several limitations affecting medical devices currently used in clinical practice. Several methods were developed over the years for wireless power transfer. In this review article, we report and discuss the three most relevant methodologies for extremely miniaturised implantable neurostimulators: ultrasound coupling, inductive coupling and capacitive coupling. For each powering method, the discussion starts describing the physical working principle. In particular, we focus on the challenges given by the miniaturisation of the implanted integrated circuits and the related ad-hoc solutions for wireless power transfer. Then, we present recent developments and progresses in wireless power transfer for biomedical applications. Last, we compare each technique based on key performance indicators to highlight the most relevant and innovative solutions suitable for neurostimulation, with the gaze turned towards miniaturisation.
Bioluminescence resonance energy transfer (BRET) is a transfer of energy between a luminescence donor and a fluorescence acceptor. Because BRET occurs when the distance between the donor and acceptor is
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This document defines the requirements and operation of the on-board vehicle equipment that enables magnetic field wireless power transfer (MF-WPT) for traction battery charging of electric vehicles. It is intended to be used for passenger cars and light duty vehicles.
This paper bridges wireless communication with wireless power transfer. It shows that mobile phones can be charged remotely, while in the user's pocket by applying the concept of MIMO beamforming. However, unlike MIMO beamforming in communication systems which targets the radiated field, we transfer power by beamforming the non-radiated magnetic field and steering it toward the phone. We design MagMIMO, a new system for wireless charging of cell phones and portable devices. MagMIMO consumes as much power as existing solutions, yet it can charge a phone remotely without being removed from the user's pocket. Furthermore, the phone need not face the charging pad, and can charge independently of its orientation. We have built MagMIMO and demonstrated its ability to charge the iPhone and other smart phones, while in the user's pocket.
This book focuses on elementary concepts of both radio frequency energy harvesting (RFEH) and wireless power transfer (WPT), and highlights their fundamental requirements followed by recent advancements. It provides a systematic overview of the key components required for RFEH and WPT applications and also comprehensively introduces the pioneering research advancements achieved to date. The state-of-the-art circuit design topologies for the two different applications are presented mainly in terms of antenna operating frequencies, polarization characteristics, efficient matching network circuits, rectifier topologies, and overall rectenna systems. The book serves as a single point of reference for practicing engineers and researchers searching for potential sources and elements involved in the RFEH system as well as in the WPT system, and need rapid training and design guidelines in the following areas:
This book describes systematically wireless power transfer technology using magnetic resonant coupling and electric resonant coupling and presents the latest theoretical and phenomenological approaches to its practical implementation, operation and its applications. It also discusses the difference between electromagnetic induction and magnetic resonant coupling, the characteristics of various types of resonant circuit topologies and the unique features of magnetic resonant coupling methods. Designed to be self-contained, this richly illustrated book is a valuable resource for a broad readership, from researchers to engineers and anyone interested in cutting-edge technologies in wireless power transfer.
Takehiro Imura is an Associate Professor at the Faculty of Science and Technology, Department of Electrical Engineering at Tokyo University of Science. His research interests include wireless power transfer using magnetic resonant coupling and electric resonant coupling for stationary electric vehicles, in-motion electric vehicles, medical equipments, space equipments, IoT devices and sensors. His research interests also include fusion of dynamic wireless power transfer for electric vehicle and solar power to reduce CO2.
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This article focuses on diagnosing home and community environments to assist clinicians in identifying and justifying the functional, psychosocial, and medical needs for power seat elevation and standing systems for power wheelchair users.
Industry advocates have for years been requesting that CMS move power seat elevation (E2300) and standing systems (E2301) from non-covered to a covered category and establish coverage criteria like they have for power tilt, recline, and other power features. CMS received and accepted an NCD (coverage policy) submission for consideration of these items and recently opened part of it for public comment regarding power seat elevation. Standing systems will be considered at a later date. If CMS moves an item from non-covered to covered then it CAN be covered by Medicare for those that meet the established coverage criteria.
End-users who cannot safely reach outside their base of support to grab food items from a refrigerator and cabinets to prepare meals or cannot reach the stovetop to cook may find they can only eat microwavable processed foods, which could have inadequate nutritional value. In addition, they may attempt to grab food items in a pantry that are out of reach, resulting in a fall with serious injuries or a fall death. Prolonged barriers within the environment which prevent end-users from access to proper nutrition and the ability to prepare healthy meals in the home to mitigate medical complications related to comorbidities should be highlighted in the justification for power seat elevation.
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