Formwork leakage has become one of the important challenges modern construction parallel to increase in use self-compacting cementitious materials. Excessive formwork pressure coupled with highly flowable nature these materials could lead increased leakage. This paper introduces a magnetic field-based active stiffening control methodology that be beneficial for reducing during casting. As demon...

Magnetic fluid seals have the advantages of zero leakage, long life, simple structure and high reliability, become one most widely used applications magnetic fluids. In this paper, effect evaporation on pressure resistance is studied. terms theory, through theoretical calculation simulation analysis, a method for established. experiments, firstly, five groups control were set up to conduct expe...

Magnetic and electric properties are investigated for the nanosized YMnO3 samples with different grain sizes (25 nm to 200 nm) synthesized by a modified Pechini method. It shows that magnetic and electric properties are strongly dependent on the grain size. The magnetic characterization indicates that with increasing grain size, the antiferromagnetic (AFM) transition temperature increases from ...

Based on the momentum and continuity equations for ferrofluid under an applied magnetic field, assuming linear behavior for the magnetic material of the ferrofluid, and using carrying current concentric finite wire magnetic field model, the magnetic force was calculated. A modified Reynolds equation is obtained. It is simultaneously solved with the energy equation numerically by the finite diff...

In order to improve the sensitivity of online magnetic flux leakage (MFL) testing for steel pipe, a sensing method based on the magnetic guiding effect is proposed and investigated in this paper. Compared to the conventional contact sensing method using a non-ferromagnetic support, the proposed method creatively utilizes a ferromagnetic one to guide more magnetic flux to leak out. Based on Hopk...

STUDY DESIGN Magnetic resonance discography using gadolinium as an intradiscal contrast agent was investigated in a prospective study. OBJECTIVE To evaluate the utility of magnetic resonance discography using gadolinium as an intradiscal contrast agent, as compared with the current standard of computed tomographic discography using intradiscal iodinated contrast agent. SUMMARY OF BACKGROUND...