نتایج جستجو برای: magnet
تعداد نتایج: 18990 فیلتر نتایج به سال:
Magnet Pole Design CANDLE booster synchrotron magnetic lattice contains 48 dipoles of H-shape. Detailed magnetic and mechanical design of those magnets is performed within the framework of the project. In this report, the design considerations of the dipole magnet, including the magnetic field simulation is presented. The results of the numerical simulation are compared with the magnetic field ...
Although no effects of permanent magnets on resting skin blood flow (SBF) in humans have yet been demonstrated, the possibility that magnet related effects might modify dynamic SBF changes has not been previously studied. We hypothesized that magnets may alter local neurovascular mechanisms to cause changes in normal SBF vasoactive responses. To test this, we studied the effects of a magnet on ...
Most contemporary demand pacemakers contain a magnetic reed switch easily actuated by the application of an external magnet over the pulse generator. This report describes the unusual response of two implanted pulse generators to the testing magnet. The magnetic reed switch of one pulse generator was found to 'stick' in the open position making it impossible to revert the pulse generator to its...
Permanent magnet synchronous machines are known as a good candidate for hybrid electric vehicles due to their unique merits. However they have two major drawbacks i.e. high cost and small speed range. In this paper an optimal design of a permanent magnet machine is presented. A reduction of permanent magnet material for a constant torque and an extension in speed and torque ranges are chosen as...
INTRODUCTION Magnet ingestion usually does not cause serious complications, but in case of multiple magnet ingestion or ingestion of magnet with other metal it could cause intestinal obstruction, fistula formation or even perforation. CASE REPORT We report case of intestinal obstruction and fistula formation following ingestion of 25 magnets in a 2-year-old girl. Intraoperatively omega shaped...
A permanent magnet synchronous motor (PMSM) with rotor embedded segmented permanent magnet was analyzed. The structural features and flux weakening principle are introduced. The shape of the rotor is optimized to get a sinusoidal air gap magnetic density waveform and reduce the toque ripple. The whole-permanent-magnet (PM) motor and the segmented-permanent-magnet motor are compared from the asp...
BACKGROUND It is not clear whether Magnet recognition by the American Nurses Credentialing Center (nursing excellence program) is associated with improved patient outcomes. We investigated whether hospitalization in a Magnet hospital is associated with improved outcomes for patients with ischemic stroke. METHODS AND RESULTS We performed a cohort study of patients with ischemic stroke from 200...
Internally-balanced Magnetic Unit (IB Magnet) has been developed as a fundamental technique of wall climbing robots. This unit comprises of a permanent magnet which generates a strong sticking force, and a spring unit which cancels the internal force so that the unit can provide easy sticking and releasing actions. In this paper, the authors aim to enlarge usefulness of IB Magnet by several app...
A p o l y h e l i x magnet w i t h a B i t t e r c o i l (duplex magnet) o r w i t h a superconducting c o i l ( h y b r i d magnet) f o r the background f i e l d generat ion, i s known t o produce the h ighest magnetic f i e l d s . Numerical ca lcu la t ions i n v o l v i n g system parameters establ ished i n the course o f 1000 hours o f operat ion o f the Grenoble duplex magnet a re used ...
A common problem for elliptically polarizing undulators (EPUs) is that the magnetic forces give a mechanical deflection in the magnet holder construction when changing the undulator phase. Gluing horizontally and vertically magnetized blocks together can increase the mechanical stability of the magnet holders. The gluing process of pairs of magnetized magnet blocks is time-consuming, expensive ...
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