A Short and Light, Sparse Dipolar Halbach Magnet for MRI

Intraoperative MRI: a moving magnet.

Optimal Halbach Permanent Magnet Designs for Maximally Pulling and Pushing Nanoparticles.

Optimization methods are presented to design Halbach arrays to maximize the forces applied on magnetic nanoparticles at deep tissue locations. In magnetic drug targeting, where magnets are used to focus therapeutic nanoparticles to disease locations, the sharp fall off of magnetic fields and forces with distances from magnets has limited the depth of targeting. Creating stronger forces at depth...

Ferromagnetism, glassiness, and metastability in a dilute dipolar-coupled magnet.

%e have measured the ac magnetic susceptibility of the model dilute dipolar-coupled Ising system LiHo„Y& -„F4. The x 0.46 material displays an ordinary ferromagnetic transition, while the x 0.045 and 0.167 samples are two very different magnetic glasses. Thermal relaxation times are more than five times longer for x 0.167 than for x ~0.045. In addition, the more concentrated glass shows history...

passivity in waiting for godot and endgame: a psychoanalytic reading

this study intends to investigate samuel beckett’s waiting for godot and endgame under the lacanian psychoanalysis. it begins by explaining the most important concepts of lacanian psychoanalysis. the beckettian characters are studied regarding their state of unconscious, and not the state of consciousness as is common in most beckett studies. according to lacan, language plays the sole role in ...

MRI without the magnet.

T here is no doubt that magnetic resonance imaging (MRI) has had an enormous impact in science and medicine. Dating back to the initial ‘‘zeugmatography’’ work of Paul Lauterbur (1) and echo-planar imaging by Peter Mansfield (2) in the 1970s that resulted in their 2003 Nobel Prize, MRI has undergone dramatic progress over the ensuing years (3). For example, functional MRI is being widely used t...