|Traditional RF enclosures are formed by metal bulk material, in which the eld decays exponentially over a skin depth = p 2=! 0. With typical bulk dimension at least one order of magnitude higher than , the eld outside the metal enclosure is then negligible. The surface resistance Rs presented to the RF eld is 1= . This article presents analysis of an RF shield formed by thin metal lm. We nd th...

BACKGROUND Owing to increased complexity in the evolution of society, stress has become an important public health problem, and is responsible for more than 30 types of diseases. Most of the research on stress conducted to date has focused on physical and psychological aspects; however, there are very few reports about the association between psychological stress and elements within the residen...

The aim of this study was to evaluate the effect of a moisturizer containing urea on allergic contact dermatitis. Twenty-five nickel-sensitized patients and five controls (non-sensitized volunteers) applied such a moisturizer on the volar side of one forearm twice daily for 20 days, while the other forearm served as the control. After treatment with the moisturizer, patch tests with 0%, 0.5% an...

Models for acoustic transducers, such as loudspeakers, mastoid bone-drivers, hearing-aid receivers, etc., are critical elements in many acoustic applications. Acoustic transducers employ two-port models to convert between acoustic and electromagnetic signals. This study analyzes a widely-used commercial hearing-aid receiver ED series, manufactured by Knowles Electronics, Inc. Electromagnetic tr...

studies show that any complications including hemorrhage, lack of blood supply, lack of oxygen supply, and death of cells in a tissue, will have a clear effect on electrical properties of that tissue. thus, by measuring impedance of a set of tissues, potential problems of the damaged tissue may be found. since electrical impedance is closely related to the measuring frequency, obviously, every ...

The aim of this investigation is to determine the output force variability of the new bone conduction transducer, called balanced electromagnetic separation transducer (BEST), and of the conventional transducer from Radioear B71. The variability of the output force is dependent on different load conditions. The loads used were the mechanical impedance of the skull of thirty test persons and the...

For several years, at the Institute Guttmann Neurorehabilitation Hospital (Barcelona, Spain), we have been applying Transcranial direct current stimulation (tDCS) for the management of Neuropathic pain after spinal cord injury. TDCS has been established as useful therapeutic option for patients with neuropathic pain [1]. Several recent studies demonstrate its efficacy, good tolerance and minima...

During this program we have had several major accomplishments. These include finalizing our prior work on simple anisotropic surfaces consisting of discrete regions of homogeneous impedance values, and demonstrating them in the form of several useful structures. Examples include beam shifting structures, and scattering control surfaces. We have also developed a new method for patterning anisotr...