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Elisa Mejía-Mejía and Panicos A. Kyriacou
Pulse rate variability (PRV), measured from pulsatile signals such as the photoplethysmogram (PPG), has been largely used in recent years as a surrogate of heart rate variability (HRV), which is measured from electrocardiograms (ECG). However, different ...
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Xinlin Wang, Han Yu, Jinkun Jiang, Chengui Xia and Zengxia Zhang
As a very common type of laser additive manufacturing technology, laser material deposition (LMD) is widely used, having exceptional application advantages including surface enhancing, repairing damaged parts with high value-add, and building functionall...
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Frédéric Bousefsaf, Alain Pruski and Choubeila Maaoui
Remote pulse rate measurement from facial video has gained particular attention over the last few years. Research exhibits significant advancements and demonstrates that common video cameras correspond to reliable devices that can be employed to measure ...
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Stefan Scharring and Jürgen Kästel
Ground-based high-power lasers are, in principle, able to de-orbit any kind of space debris object from the low Earth orbit (LEO) by remotely inducing laser-ablative momentum. However, the assessment of efficiency and operational safety depends on many f...
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Sooheyong Lee, Hyusang Kwon, Byeong-Gwan Cho and Eric C. Landahl
We present the technical realization of a high-speed hard X-ray single-photon counting-detection scheme based on a commercial avalanche silicon photodiode and high-speed oscilloscope. The development is motivated by the need to perform pulse-resolved pho...
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Wenhao Tan, Longxi Zheng, Jie Lu and Zhiyi Xiao
In order to obtain the dynamic operating characteristics of a pulse detonation turbine engine (PDTE), a transient model is established considering the shaft dynamics and the volumetric effect of the components in the PDTE. The accuracy of the model is ve...
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Xiaojing Ren, Yong Wang, Jian Zhang, Dingyuan Tang and Deyuan Shen
A short-pulse-width repetitively Q-switched 2.7-µm Er:Y2O3 ceramic laser is demonstrated using a specially designed mechanical switch, a metal plate carved with slits of both slit-width and duty-cycle optimized. With a 20% transmission output coupler, st...
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SeBu Oh, SeHoon Oh and ByeongRo Min
Adjusting the filling pressure is essential to fit the final gas volume when charging a carbonated beverage with high pressure. However, in the previous mechanical carbonated ambient filling system, it was difficult to control and monitor the charging co...
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Min-Hye Lee, Hyung-Jin Mun and Sun-Kyoung Kang
We propose a study to predict health abnormalities by analyzing body temperature and the heart rate variability parameters of pulse waves. The research method firstly selects fever by applying a deep learning model to thermal images, and secondly, extrac...
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Shuaishuai Yang, Zijian Cui, Ziming Sun, Pan Zhang and Dean Liu
Compact, stable, high-power and high repetition rate picosecond laser systems are excellent sources for optical parametric chirped pulse amplification systems and laser satellite ranging systems. Compared with the traditional complex high-power amplifier...
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Dongpo Zhu, Peiyun Zhang, Zhixiang Tian, Cheng Chen, Xijun Hua, Sheng Xu and Xuan Xie
A two-dimensional numerical model considering recoil pressure and Hertz-Knudsen ablation rate was established on the foundation of the laser remelting model to investigate the influence of laser processing parameters on crater feature and melted zone, an...
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Mingliang Ma, Liming Wang, Jianfeng Li, Xiujie Jia, Xing Wang, Yuan Ren and Yuansheng Zhou
As a common mechanical material for mining machinery, Q345 is prone to oxidation due to the moist working environment. At present, laser cleaning is often used to remove rust oxides from the substrate. The pollutant of mining machinery is comprised of a ...
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Guido Toci, Zeudi Mazzotta, Luca Labate, François Mathieu, Matteo Vannini, Barbara Patrizi and Leonida A. Gizzi
The purpose of the European project EuPRAXIA is to realize a novel plasma accelerator user facility. The laser driven approach sets requirements for a very high performance level for the laser system: pulse peak power in the petawatt range, pulse repetit...
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Shibao Deng, Yun Zhu and Yixin Zhang
By using the two-frequency coherence function model of a beam in a turbulent medium and the localized wave theory of the polychromatic beam, we develop the spectrum average mutual coherence function of the localized wave of Bessel?Gaussian amplitude enve...
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Lucia Giuliano, Gaia Franciosini, Luigi Palumbo, Lilia Aggar, Marie Dutreix, Luigi Faillace, Vincent Favaudon, Giuseppe Felici, Federica Galante, Andrea Mostacci, Mauro Migliorati, Matteo Pacitti, Annalisa Patriarca and Sophie Heinrich
Purpose: The electron linac ElectronFlash installed at Institut Curie (Orsay, France) is entirely dedicated to FLASH irradiation for radiobiological and pre-clinical studies. The system was designed to deliver an ultra-high-dose rate per pulse (UHDR) (ab...
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Jingyuan Liang, Shuiqing Lin and Xizheng Ke
Four-level pulse amplitude modulation (PAM4) can transmit more information in the same symbol interval, effectively improving the information transmission rate and frequency band utilization of visible light communication (VLC). This paper proposes a met...
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Oskars Ozolins, Xiaodan Pang, Aleksejs Udalcovs, Richard Schatz, Sandis Spolitis, Vjaceslavs Bobrovs, Gunnar Jacobsen and Sergei Popov
We experimentally evaluate the high-speed on?off keying (OOK) and four-level pulse amplitude modulation (PAM4) transmitter?s performance in C-band for short-reach optical interconnects. We demonstrate up to 100 Gbaud OOK and PAM4 transmission over a 400 ...
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Franziska Treffert, Chandra B. Curry, Todd Ditmire, Griffin D. Glenn, Hernan J. Quevedo, Markus Roth, Christopher Schoenwaelder, Marc Zimmer, Siegfried H. Glenzer and Maxence Gauthier
High-flux, high-repetition-rate neutron sources are of interest in studying neutron-induced damage processes in materials relevant to fusion, ultimately guiding designs for future fusion reactors. Existing and upcoming petawatt laser systems show great p...
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Honghang Zhou, Yan Li, Yuyang Liu, Lei Yue, Chao Gao, Wei Li, Jifang Qiu, Hongxiang Guo, Xiaobin Hong, Yong Zuo and Jian Wu
In recent years, short-reach optical links have attracted much more attention and have come to constitute a key market segment due to the rapid development of data-center applications and cloud services. Four-level pulse amplitude modulation (PAM4) is a ...
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Jinlong Wei, Ji Zhou, Elias Giacoumidis, Paul A. Haigh and Jianming Tang
To address the continuous growth in high-speed ubiquitous access required by residential users and enterprises, Telecommunication operators must upgrade their networks to higher data rates. For optical fiber access networks that directly connect end user...
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