In this paper, we give an analytical approximate solution for an integro- differential equation which describes the charged particle motion for certain configurations of oscillating magnetic fields is considered. The homotopy analysis method (HAM) is used for solving this equation. Several examples are given to reconfirm the efficiency of these algorithms. The results of applying this procedure...

OBJECTIVES In industrial settings, minute particles of industrial substances lodge in the lungs and accumulate over decades, often leading to pneumoconiosis. Although these particles have been almost impossible to detect with x-rays, especially initially, we still rely upon them for detection of such deposits. As a result, particle accumulation is not detected early enough, and eventually diagn...

First-order Fermi acceleration processes at ultrarelativistic (γ ∼ 5−30) shock waves are studied with the method of Monte Carlo simulations. The accelerated particle spectra are derived by integrating the exact particle trajectories in a turbulent magnetic field near the shock. The magnetic field model upstream of the shock assumes finite-amplitude perturbations within a wide wavevector range a...

Microstructured particles were synthesized by growing colloidal crystals in aqueous droplets suspended on fluorinated oil. The droplets template highly ordered and smooth particle assemblies, which diffract light and have remarkable structural stability. The method allows control of particle size and shape from spheres through ellipsoids to toroids by varying the droplet composition. Cocrystall...

Abstract Magnetic particle imaging (MPI) quantitatively visualizes in vivo superparamagnetic iron oxide nanoparticles (SPIONs), which has shown great promises biomedicine. In this paper, we propose a single harmonic-based narrowband MPI approach via measuring harmonic—3 f 0 harmonic—of the SPIONs induced an excitation magnetic field with frequency = 5 kHz. The scanner is built to scan field-fre...

In this work, we briefly review magnetic separation of ferrofluids composed of large magnetic particles (60 nm of the average size) possessing an induced dipole moment. Such ferrofluids exhibit field-induced phase separation at relatively low particle concentrations (∼0.8%vol.) and magnetic fields (∼10 kA/m). Particle aggregates appearing during the phase separation are extracted from the suspe...