Microwave absorbing materials are usually designed to solve protection against electromagnetic interference in wireless communication systems and high frequency circuit mechanisms. In this research polystyrene (PS) nanocomposites containing various nano-fillers were successfully synthesized. The novelty of this work is comparing of three various nanostructures: non-metallic conductive graphene ...

The in-situ testing of early age concrete strength is crucial for determining the time of form removal from concrete elements, opening highways to traffic or applying of prestress to steel reinforcement. A nondestructive ultrasonic technique, which measures the reflection loss of ultrasonic transverse waves at a concrete-steel interface, is presented in this paper. The focus is to compare wave ...

This paper presents a new methodology to model the nearground short-range propagation loss in forested areas at the VHF and the UHF band. The path loss modeling is performed by an integration of the foliage induced effect and the effect from the radiowave reflection/reflections. The analysis shows that the reflection from the dense tree canopy is important for short-range propagation at the VHF...

In this paper, the correlation of reflection loss measured by an ultrasonic shear wave reflection method and the microstructure in cement-based material is investigated. Three cement pastes (Portland cement type I) with different water-cement ratios (0.35, 0.50 and 0.60) cured at 25 °C were examined. The ultrasonic shear wave reflection factor (WRF) was measured by the wave reflection technique...

radar absorbing materials, i.e. magnetite (fe3o4) coated carbon fibers (mccfs) were fabricated by electro-deposition technique. black-colored single spinel phase fe3o4 nanoparticles was easily synthesized by hydrothermal method using reduction of a fe (iii) - triethanolamine complex in an aqueous alkaline solution at 60-80 ◦c. uniform and compact fe3o4 films were fabricated on nitric acid treat...

In studies of microwave absorption in the current literature, theories such as reflection loss, impedance matching, delta function, and quarter-wavelength model have been inappropriately applied. As shown this case study, these problems need to be corrected they are representative similar work literature.

Metal-insulator-metal (MIM) structures have been the subject of great interest as nanoscale plasmonic waveguides. The modeling and measurement of the loss in these waveguides is one of the critical issues in realizing the plasmon-based nanocircuitry. Due to the subwavelength size of the structure, the light injection and the measurement of the loss in MIM structures typically require tapered fi...

In this work, a physics-based model of a trombone coupled to a lip reed is presented, with the parameter space explored for the purpose of real-time sound synthesis. A highly configurable dynamic lip valve model is reviewed and its parameters discussed within the context of a trombone model. The trombone model is represented as two separate parametric transfer functions, corresponding to tappin...

Measurements of local order are demonstrated in Sn-containing alloys and epitaxial monolayer thickness films by analysis of extended-edge energy loss fine structure ~EXELFS! data obtained by reflection electron energy loss spectrometry ~REELS!. These measurements of short-range order provide a complement to the chemical information obtained with REELS and long-range order obtained using reflect...