Introduction: Measuring magnetic induction phase shift (MIPS) changes as a function of cerebral hemorrhage volume has the potential for being a simple method for primary and non-contact detection of the occurrence and progress of cerebral hemorrhage. Our previous MIPS study showed that the intracranial pressure (ICP) was used as a contrast index and found the primary correlation between MIPS and ICP.Materials and Methods: In this study, we theoretically deduced the approximate relationship between MIPS and ICP and carried out a comparison study between MIPS and ICP on cerebral hemorrhage in rabbits in this study. Acute cerebral hemorrhage was induced by injecting autologous blood (3 to 6mL) into the brain of rabbits in the experimental group (n=7).Results: The animal experiment results showed that the MIPS decreased significantly as a function of injection volume in the experimental group and the changes of ICP and MIPS of rabbits from experimental group presented a negative correlation. We also found that the MIPS slopes of all experimental samples had a change trend from fastness to slowness with a reverse of the change of ICP.Conclusion: These observations suggested that the non-contact MIPS method might be valuable and potential for monitoring acute cerebral hemorrhage and obtaining the ICP information.

Background: In the recent years, mercury contamination has attracted great deal of attention due to its serious environmental threat.Objectives: The main goal of this study was application of one-step synthesized magnetic (magnetite) chitosan nanoparticles (MCNs) in the removal of mercury ions from petrochemical waste water.Materials and Methods: This study was performed in batch and column modes. Effects of various parameters such as pH, adsorbent dose, contact time, temperature and agitation speed for the removal of mercury ions by MCNs investigated in batch mode. Afterwards, optimum conditions were exploited in column mode. Different kinetic models were also studied.Results: An effective Hg (II) removal (99.8%) was obtained at pH 6, with 50 mg of MCNs for an initial concentration of this ion in petrochemical waste water (5.63 mg L-1) and 10 minutes agitation of the solution. The adsorption kinetic data was well fitted to the pseudo-second-order model.Conclusions: Experimental results showed that MCNs is an excellent sorbent for removal of mercury ions from petrochemical waste water. In addition, highly complex matrix of this waste does not affect the adsorption capability of MCNs.

Flapping-wing robotic insects are small, highly maneuverable flying robots inspired by biological insects and useful for a wide range of tasks, including exploration, environmental monitoring, search and rescue, and surveillance. Recently, robotic insects driven by piezoelectric actuators have achieved the important goal of taking off with external power; however, fully autonomous operation requires an ultralight power supply capable of generating high-voltage drive signals from low-voltage energy sources. This paper describes high-voltage switching circuit topologies and control methods suitable for driving piezoelectric actuators in flapping-wing robotic insects and discusses the physical implementation of these topologies, including the fabrication of custom magnetic components by laser micromachining and other weight minimization echniques. The performance of laser micromachined MAGNETICS and custom-wound commercial MAGNETICS is compared through the experimental realization of a tapped inductor boost converter capable of stepping up a 3.7V Li-poly cell input to 200V. The potential of laser micromachined MAGNETICS is further shown by implementing a similar converter weighing 20mg (not including control functionality) and capable of up to 70mW output at 200V and up to 100mW at 100V.

Implant-supported craniofacial prostheses are made to restore defective areas in the face and cranium. This clinical report describes a technique for fabrication of an orbital prosthesis with three adjacent implants in the left lateral orbital rim of a 60-year-old woman. Selection of appropriate attachment system (individual magnetic abutments versus bar-clip attachment) for implant-supported orbital prostheses depends upon the position of implants. Bar-magnetic attachment has been selected as the retention mechanism in the present case.

One of the parameters derived from field measurements of Sub-Audio MAGNETICS (SAM) technique is called Total Field Magnetometric Resistivity (TFMMR). In general, SAM is a high resolution technique that obtains subsurface electrical and magnetic properties through measuring total magnetic field including the synthetic geomagnetic field associated with the low frequency (less than 200 Hz) galvanic current flowing in the earth. In a previous paper by one of the authors of this paper, the anomalous TFMMR responses due to simple geometrical targets have been presented in details. However, as was pointed out in that paper, the simple models are ideal models that are rarely exists in nature and hence the need to find the solution for complex structures using numerical methods is inevitable. In this paper, the theoretical basis of the TFMMR parameter and the behavior of the governing electric and magnetic fields over 2-D structures in both spatial and wave number domains are derived first. Next the selection of the proper numerical technique for TFMMR forward modeling over 2-D structures via employing 3-D sources (point source electrodes) is followed by addressing the numerical difficulties encountered in the course of obtaining valid responses including 1) the singularity associated with the source term (current electrode) in the governing partial differential equations, 2) the singularity associated with the inverse Fourier transform and 3) singularities associated with computing different magnetic field components. Finally, some methods for resolving the numerical singularities are presented and the validity and accuracy of the numerical results against the available simple analytical solutions are evaluated.

accurate detection and characterization of lymph node metastases is crucial for planning therapy and determining prognosis in patients with various un-derlying primary tumors such as the breast, prostate, head and neck, urogenital, melanoma and other cancers. CT and MR imaging are of limited value because they primarily rely on the tumor size for differentiating benign from malignant lymph nodes. Ultrasmall super paramagnetic iron oxide (USPIO) (Combidex or Ferumoxtran-10; Advanced MAGNETICS, Sinerem; Guerbet) is an MR contrast agent that has shown improved accuracy in the staging of lymph nodes in cancer patients. Animal and recent human studies have shown that USPIO particles allow MR differentiation of benign from malignant lymph nodes based on enhancement patterns.This lecture is a review about new imaging methods in oncological imaging, especially for the lymphatic system.