We consider imaging of the building interior structures using Compressive Sensing (CS) with applications to through-the-wall imaging and urban sensing. We consider a monostatic synthetic aperture radar imaging system employing stepped frequency waveform. The proposed approach exploits prior information of building construction practices to form an appropriate sparse representation of the buildi...

Using microwave currents, we excite resonances of geometrically confined pinned domain walls, detecting the resonance by the rectification of the microwave current. By applying magnetic fields, the resonance frequency of the domain wall oscillator can be tuned over a wide range. Increasing the power leads to a redshift due to the nonlinearity of the system. From this frequency shift, we directl...

Introduction: Dark blood coronary artery wall imaging has demonstrated the ability to detect vessel wall thickening in subjects with non-significant coronary heart disease [1]. For high resolution imaging, studies are generally performed with diaphragmatic navigator gating which has an inherently low respiratory efficiency (RE) and is further compromised by respiratory drift through the long ac...

Modern wireless communication systems are based on microwave technologies. Ferroelectric devices with the electric field dependent dielectric properties and low dielectric losses at microwave frequencies are very promising. Capacitance tunability nc, defined as the ratio of the capacitance at zero applied bias voltage to the capacitance at some desired applied voltage, is the key functional pro...

Imaging the fields of magnetic materials provides crucial insight into the physical and chemical processes surrounding magnetism, and has been a key ingredient in the spectacular development of magnetic data storage. Existing approaches using the magneto-optic Kerr effect, x-ray and electron microscopy have limitations that constrain further development, and there is increasing demand for imagi...

Effects of microwave irradiation on bamboo cell wall structures were studied. Microwave treatment resulted in samples exhibiting smoother surfaces, deformed parenchyma cells, and increased porosity. altered microfibril orientation through the formation hydrogen bonds. The peak at 3440 cm-1, assigned to O-H stretching, decreased. Meanwhile, intermolecular intramolecular bonds formed, increasing ...

In this paper a novel bio-inspired neural network (BINN) has been created for microwave diversity imaging compression. This work focuses on, firstly incorporating BINN and back propagation learning into a multiresolution, and secondly, training the highpass channel for perfect reconstruction so that the BINN filterbank within realistic coding conditions. Experiments have shown the robustness an...

Due to their low frequency contents, ultra wideband (UWB) signals have the ability to penetrate walls and obstacles. As the signal propagates through these obstacles, it gets attenuated, slows down, and gets dispersed. This paper demonstrates wall compensation for throughwall imaging, localization and communication receiver design purposes by first characterizing wave propagation through variou...

fundal gallbladder abnormalities result from broad spectrum of pathologic that most of them have no pathological significance and normally causes no symptoms. conversely, early incidental detection of malignant lesions is important because symptomatic lesions are often incurable. so use proper imaging to differentiate between them is important. although ultrasound has been the choice screen met...