Conventional radars commonly use a linear frequency-modulated (LFM) waveform as the transmitted signal. The LFM radar is simple system, but its impulse-response function produces −13.25 dB sidelobe, which in turn can make detection of weak targets difficult by drowning out adjacent target information with sidelobe strong target. To overcome this challenge, paper presents modeling and optimizati...

[1] The tendency of global MHD models to overestimate the transpolar potential in simulations of strong geomagnetic storms and evidence of an adverse feedback of the ionospheric conductance on the potential suggest that these models lack important physics leading to the conductance enhancement. Farley-Buneman instability in the auroral ionosphere provides this lacking physics. This instability ...

Tec kinase, a prototypical member of the Tec tyrosine kinases family, was shown to mainly govern lymphocyte proliferation. In the present study, we investigated the role of Tec kinase in acute inflammatory response in lipopolysaccharide (LPS) challenge. First, we demonstrate that Tec kinase activity was observed in RAW264.7 macrophages exposed to LPS. Tec and phosphorylated Tec expression were ...

Synthetic Aperture Radar is well known for producing a radar image of the ground, so it can be used for detecting onthe-ground object which is interesting for some applications. A possible application can be Foreign Object Detection (FOD), which is an important issue in aviation safety. A ground-based Circular Bistatic Synthetic Aperture Radar (Circular-BiSAR) is introduced in this paper. The c...

Citation: Lima SA, Guerra-Duarte C, Costal-Oliveira F, Mendes TM, Figueiredo LFM, Oliveira D, Machado de Avila RA, Ferrer VP, Trevisan-Silva D, Veiga SS, Minozzo JC, Kalapothakis E and Chávez-Olórtegui C (2018) Recombinant Protein Containing B-Cell Epitopes of Different Loxosceles Spider Toxins Generates Neutralizing Antibodies in Immunized Rabbits. Front. Immunol. 9:653. doi: 10.3389/fimmu.201...

In a complex electromagnetic environment, any noise present generally exhibits strong impulsive characteristics. The performance of existing parameter estimation methods carried out in Gaussian white for the linear frequency modulation (LFM) signal degrades or even fails under noise. This paper proposes novel method to address this problem. Firstly, properties piecewise nonlinear amplitude tran...