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This paper presents the characterization of frequency response and mode shape at the 1st harmonic frequency of a Micro-Opto-Mechanical Acoustic Sensors (MOMAS) with a Mach-Zehnder Interferometer (MZI) readout system. In previous research, the static modeling and characterization has been demonstrated. In this paper, we investigate the capability of using MOMAS in ultrasound domain as a Micro-Opto-Mechanical...
Acceleration of electrons using intense laser pulses that excite multi-gigavolt fields in plasmas will be described and the path forward to practical accelerators. Experiments with the
The discovery of giant magnetoresistance (GMR) opens the door of spintronics [1]. Recently, GMR and tunneling magnetoresistance (TMR) spintronic devices prepared on flexible substrates, so called flexible spintronics, have attracted a lot of interest due to the mechanical flexibility, light weight, and low cost compared with rigid materials [2]. Controlling the magnetization direction by tuning the...
Exchange bias (EB) effect has been widely applied in magnetoelectronic devices such as magnetic tunneling junctions and spin valve sensors. Nowadays, the EB related flexible magnetic multilayers have found their application in wearable electronics, which are stretchable and bendable, and hence are closely strain related [1, 2]. Therefore, the investigation on the strain-mediated multi-field control...
The project BELLA (LBNL, USA) is aimed to create an experimental facility for further advancing the development of laser-driven electron acceleration1. BELLA's unique attribute is the ability to use laser light to accelerate an electron beam up to 10 GeV level in a comparatively short distance of approximately one meter. The acceleration takes place during the propagation of a high power femtosecond...
This paper presents a linear LSP interpolation between neighboring frames. Usually there are two to four formants in speech spectrum envelope, and the LSF(Line Spectral Frequency) parameters have an order property. In this paper, we divide the LSF parameters into three sub-vectors, and predict them by the vectors of previous and next frames. An efficient and reliable LSP vector distance measure is...
The characters of sea clutter are studied, and the faults of restraint method using the single radar are indicated. Then the restraint method of distribution detection of multiple radars is proposed, with the feasibilities and advantages studied. Next the detailed algorithm is discussed. Further the proposed method is tested by the real data from surveillance radar, the effect of which is greatly...
Multi-GeV electron acceleration of electrons using intense laser pulses that excite multi-gigavolt fields in plasmas will be discussed. Experimental results with the new BELLA PW-class lasers and supporting simulations will be presented as well as a path forward to apply this acceleration method towards practical machines.
Antiguided VCSEL arrays are evaluated using an above threshold analysis. Single-mode output power is enhanced by including reflective boundaries at the array edges, and CW single-mode operation of 100mW is predicted from 5×5 2D arrays.
Low transparency of conventional transparent conducting oxides (TCOs) in the IR region (λ∼1000 nm) due to absorption and reflection by the high concentration of free carrier restricts the applications of materials to photovoltaics that do not use the infrared part of the solar spectrum. In order to maintain low resistivity with reduced free carrier absorption, TCOs with high mobility are required...
For uni-traveling carrier photodiodes (UTC-PDs) using InGaAs and InP as the absorber and collector, an abrupt heterojunction at the absorber-collector interface may induce a large degradation of current handling and microwave performance caused by the current blocking effect. In this work, UTC-PDs with dipole doping at the InGaAs/InP interface to suppress the current blocking are demonstrated. By...
In multi-channel wireless networks, effective scheduling algorithms are indispensable for fully harvesting the benefit of multiple channels. Since scheduling decisions need to be made quickly under time-varying wireless channels and traffic dynamics, low-complexity algorithms are especially appealing. In this paper, we study the problem of scheduling in multichannel wireless local area networks. We...
In this paper, we investigate the important problem of optimal path selection and rate allocation for concurrent video sessions in a multihop wireless network. We present a novel formulation of the problem, which optimizes the application level performance such as video distortion, while seamlessly incorporating the network layer parameters such as packet delay and loss. For the formulated problem,...
The adaptive algorithm for parametric time delay estimate of pulse signal in Gaussian noise is studied by using third order statistics. The results of computer simulations show that the approach, that used the third order cross-correlation function to solve, quite well, the problem of the time delay estimation due to the correlated noise in the case where the signal is assumed to be a nonGaussian...
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