Magneto-active polymers (MAPs), composed of polymer matrices and magnetic filler particles, are smart materials that deform quickly in an external magnetic field. The ability to produce large deformation of MAPs makes these materials promising for actuators and sensors. Due to the viscoelasticity of the polymer matrices, MAPs usually demonstrate ratedependent dynamic properties. However, very f...

Abstract In this paper, we present a novel arbitrary-order discrete de Rham (DDR) complex on general polyhedral meshes based the decomposition of polynomial spaces into ranges vector calculus operators and complements linked to in Koszul complex. The DDR is fully discrete, meaning that both are replaced by counterparts, satisfies suitable exactness properties depending topology domain. conjunct...

Deformable models often vary in object boundary representation and the external force field used. Conventional methods, i.e. geodesic active contour model [1], have difficulties in dealing with boundary concavities, weak edges and image noise. Some approaches such as the generalized gradient vector flow (GGVF) [3] showed some improvements but have convergence issues caused by saddle or stationa...

The integration of compact concepts and advances in permanent-magnet technology improve the safety, usability, endurance, simplicity unmanned aerial vehicles (UAVs) while also providing long-term operation without maintenance larger air gap use. These developments have revealed demand for use magnetic couplers to magnetically isolate aircraft engines starter-generator shafts, allowing contactle...

Introduction. Superconducting magnetometers based on SQUIDs (SQUID- QUantum Interference Device) are currently used to register weak magnetic fields generated in various human organs and measured outside the body (in environment). The creation of information technology, which is a set methods software tools combined into technological chain that ensures registration, storage, pre-processing, an...

Composite materials ( bred, strati ed, porous, : : :) play an important role in many branches of Mechanics, Physics, Chemistry and Engineering. Typically, in such materials, the physical parameters (such as conductivity, elasticity coe cients, : : :) are discontinuous and oscillate between the di erent values characterizing each of the components. When these components are intimately mixed, the...

We report a modular atomic force microscope (AFM) design for biomolecular experiments. The AFM head uses readily available components and incorporates deflection-based optics and a piezotube-based cantilever actuator. Jetted-polymers have been used in the mechanical assembly, which allows rapid manufacturing. In addition, a FeCo-tipped electromagnet provides high-force cantilever actuation with...

Typically, the force between paramagnetic particles in a uniform magnetic field is calculated using either dipole-based models or the Maxwell stress tensor combined with Laplace's equation for magnetostatics. Dipole-based models are fast but involve many assumptions, leading to inaccuracies in determining forces for clusters of particles. The Maxwell stress tensor yields an exact force calculat...