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We present a results of dual-crystal Yb:KGW laser development that is capable to operate as a actively Q-switched oscillator with output power up to 24 W and pulse length of 20 ns, or as a regenerative amplifier with output power up to 21 W and pulse duration below 200 fs after compression of chirped pulses. Both lasers have excellent beam quality with beam parameter M2<1.2. We discuss some aspects...
New method to extract the amount of floating (FG) charge (QFG) apart from oxide trapped charge (Qox) generated by program and erase (P/E) cycles is proposed, for the first time. QFG shift by P/E cycling shows asymmetry between programmed and erased states as follows; QFG exhibits the peak at ~100 cycles in programmed state, while QFG monotonically reduces in erased state. Next, the midgap voltage...
Discriminative models, like support vector machines (SVMs), have been successfully applied to speech recognition and improved performance. A Bayesian non-parametric version of the SVM, the infinite SVM, improves on the SVM by allowing more flexible decision boundaries. However, like SVMs, infinite SVMs model each class separately, which restricts them to classifying one word at a time. A generalisation...
In this paper, a standard electronic plug-in based on high speed high resolution ADCs is presented, which is developed for the TDCR (Triple-to-Double Coincidence Ratio) coincidence counting system. The main goal of the plug-in is to replace the module MAC3 which is widely used in the TDCR system. It digitalizes the signals of the three PMTs and stores the coincidence signals for later offline analysis...
Identification of teleconnection patterns at a local scale is challenging, largely due to the coexistence of non-stationary and non-linear signals embedded within sea surface temperature (SST) anomalies. This study investigates how the oceanic teleconnection signals affect the forested sites in the North and Central America based on mulitsensor data. These impacts were found to affect 20–40% of precipitation...
We demonstrate a broadband Kerr frequency comb and mode-locking in a globally-normal-dispersion microresonator. A record short on-chip pulse of 74-fs is directly measured. Supported by analytical theory and numerical modeling, we describe the mode-locking mechanism.
Dynamic asset rating is one of a number of techniques that could be used to facilitate low carbon electricity network operation. This paper focusses on distribution level transformer dynamic rating under this context. The models available for use with dynamic asset rating are discussed and compared using measured load and weather conditions from a trial Network area within Milton Keynes. The paper...
This paper presents a charge-balanced 4-wire interface on medical platinum wires for biomedical implants. This interface was originally designed to deliver power and full duplex data between implanted units of a retinal prosthesis. Detailed circuits on both sides of the wire interface are depicted. The proposed method ensures the total electrical charge is balanced over time within the implant to...
The Vehicular Ad Hoc Network (simply referred to as VANET) attracts lots of attention. Numerous absorbing applications of vehicular networks have been researched ranging from safety warning, intelligent navigation to mobile infotainment. This paper proposes an information dissemination scheme for urban VANET with high vehicle density and multiple hotspots. Our purpose is to obtain valid routing as...
As a crucial security problem, anti-spoofing in biomet-rics, and particularly for the face modality, has achieved great progress in the recent years. Still, new threats arrive in form of better, more realistic and more sophisticated spoofing attacks. The objective of the 2nd Competition on Counter Measures to 2D Face Spoofing Attacks is to challenge researchers to create counter measures effectively...
The MTF of the three stages configuration, which is on the way at LANL and Air Force in America, is harassed due to energy loss and instability from long distance transportation, while the MAGO of two stages configuration, which is improving from its old version at All-RRIEP in Russia, is facing the serious impurity washed due to plasma passing the narrow nozzle between two stages. We are proposing...
This work presents a magnetic hydrogel-based microgripper which can be wirelessly manipulated by using magnetic fields. The proposed device made of biocompatible hydrogel material can be employed for the intravascular applications. The actuation mechanism for gripping motions was realized by controlling the exposure doses on the hydrogel composite in lithography process. We also successfully demonstrated...
This paper presents an aptamer-based microchip for sensitive and quantitative detection of biomolecules using matrix-assisted laser desorption/ ionization time-of-flight mass spectrometry (MALDI-TOF MS). The device is capable of both isolating analyte from samples and dispensing purified samples onto a probe plate for a following MS analysis. Aptamers selectively captured and released target molecules...
This work presents the fabrication of barbed microtip arrays which utilizes the techniques of silicon wet etching. The KOH anisotropic wet etching was employed to form standard pyramidal microtip arrays, and HF/HNO3 isotropic etching was used to create barbs on those microtips. Experimental results show that the forces for detaching the barbed microtip arrays from a human skin, a PDMS polymer, and...
This paper presents a microchip incorporating an aptamer-functionalized nanopillar substrate, enabling the specific detection of low-abundance biomolecules using surface enhanced Raman spectroscopy (SERS). In a temperature controlled microchamber, aptamers immobilized on the nanostructure surface specifically recognize target molecules. Raman-tagged biomolecules trapped within a cluster of leaning...
This paper presents the results of a simple ultrawideband (UWB) monopole antenna having an impedance bandwidth from 3.1–40 GHz. The antenna has a half-elliptical shaped radiator with microstrip-fed and a total size of 24×30×0.762 mm3. The extremely wideband characteristic of the antenna is achieved by simply using a tapered transformer and a small square slot on the ground plane.
The paper studies the performance of a novel ultra-wideband multiport self-grounded bow-tie antenna and presents simulated embedded radiation efficiencies and correlation at each antenna port, and the diversity gain of the antenna in rich isotropic multipath environment.
In this paper, we develop three new parameters for compact polarimetry to a particular application in synthetic aperture radar (SAR) maritime surveillance, i.e., the joint oil-spill and ship detection. Based on the X-Bragg rough surface scattering model, we investigate the capability of compact polarimetry, a dual-polarized system, for sea surface scattering characterization, and find that the circular-transmit-and-linear-receive...
Combining Frequency Modulation Continuous Wave (FMCW) and Inverse Synthetic Aperture Radar (ISAR), FMCW-ISAR is more practical with low cost, low power, small volume for short distance targets. However, the continuous echo signals in FMCW-ISAR system lead to dechirp distortion phenomenon during the process of dechirp for far-distance targets, especially for the space targets. In this paper, a signal...
A new full-aperture imaging algorithm for Spaceborne/Airborne hybrid sliding spotlight bistatic SAR is proposed in this paper. The SAR configuration under discussion has great advantage over traditional ones, yet suffers from the double square-root term in the bistatic slant range equation and severe spatial variance. The proposed method firstly eliminates azimuth spectrum folding by the SPECAN operation,...
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