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.
This work demonstrates an integrated cooperative power harvester collecting both RF and kinetic energy simultaneously. A permanent magnet and coils based kinetic generator and a RF energy receiving antenna are combined on one single board with a rectifier circuit. The prototype has a dimension of 50 mm × 80 mm, similar to the size of a credit card. Cooperative harvesting mode enables to improve diode's...
International standards for testing soft magnetic materials require that the magnetic flux density remain sinusoidal with respect to time. Traditionally, this has been achieved via control of the magnetic flux using either analog feedback, which provides real-time control, or iterative digital feedback, which yields more accurate solutions with the cost of increased convergence time. In certain applications,...
In order obtain the chemical energy of the explosive charges sufficiently and increase the transfer efficiency of the electromagnetic energy, this paper proposes that the max capacitor discharge current moment should be chosen as the detonation time of the radio frequency explosive magnetic flux compression generator. By comparing two radio frequency explosive magnetic flux compression generator detonations...
This paper reports our results in developing a simple MRI system for teaching the basics of MR Engineering at the undergraduate or graduate level. LabVIEW data acquisition cards were used for generating and digitizing the RF signals and controlling gradients and transmit/receive and blanking switches. A very inexpensive and simple magnet reported previously by Sahakian was used to enable simple, projection...
Radiofrequency (RF) coils for magnetic resonance imaging (MRI) and spectroscopy (MRS) have been developed for resonance at 8.3 MHz, and 200 MHz. The coils work in any direction in the main static magnetic field of MRI machines. Therefore, the coil has at least two loops orthogonal to each other. At least one loop of the coil generates magnetic flux which has a perpendicular component to the main static...
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.