10 research outputs found
Noncontact Seismocardiogram Signal Detection Using Microwave Doppler Radar
The objective of the research is to achieve non-contact detection of seismocardiogram (SCG), a representation of mechanical heart motion, using microwave Doppler radar system. The increase in demand for health monitoring requires robust, reliable, and accurate remote detection of cardiac signals. Due to its ability to penetrate non-metal obstacles, microwave Doppler radar is promising to provide a non-contact and unobtrusive measurement. In this dissertation, both the hardware system and the signal processing approaches are developed for providing an accurate and reliable measurement of cardiac signals using the microwave Doppler radar. First, a noise suppression scheme and a clutter removal strategy are investigated to improve the performance of a microwave Doppler radar system. Then, an investigation is conducted to demonstrate the effectiveness of using a radar signal to represent SCG, and a standalone method is developed to extract the SCG features from the radar signal without using a contact electrocardiogram (ECG) signal that the conventional methods rely on. With the development of the hardware system and signal processing approaches, the complete non-contact measurement and analysis of cardiac signals can be achieved.Ph.D
Probing Dirac Neutrino Properties with Dilepton Signature
The neutrinophilic two Higgs doublet model is one of the simplest models to
explain the origin of tiny Dirac neutrino masses. This model introduces a new
Higgs doublet with eV scale VEV to naturally generate the tiny neutrino masses.
Depending on the same Yukawa coupling, the neutrino oscillation patterns can be
probed with the dilepton signature from the decay of charged scalar .
For example, the normal hierarchy predicts BR BR BR when the lightest neutrino
mass is below 0.01 eV, while the inverted hierarchy predicts BR BR BR.
By precise measurement of BR, we are hopefully to probe the
lightest neutrino mass and the atmospheric mixing angle . Through
the detailed simulation of the dilepton signature and corresponding
backgrounds, we find that the 3 TeV CLIC could discover
GeV for NH and GeV for IH. Meanwhile, the future 100 TeV
FCC-hh collider could probe GeV for NH and
GeV for IH.Comment: 18 pages, 9 figure