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  1. 6581
    “…In a previous study, a chaotic synchronous system was developed by integrating the wave equation with the van der Pol boundary condition, of which the number of the parameters are only three, which is not enough for security. …”
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    Secret Communication Systems Using Chaotic Wave Equations with Neural Network Boundary Conditions
  2. 6582
    “…However, as the number of reflecting elements in an IRS increase, the beam training protocol in IRS-assisted millimeter-wave (mmWave) cellular systems requires a large beam training time because it needs to find the best beam pairs for the link between the base station (BS) and the IRS, as well as the link between the IRS and the mobile station (MS). …”
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    Fast Beam Training Technique for Millimeter-Wave Cellular Systems with an Intelligent Reflective Surface
  3. 6583
    “…Then, one can compare the current situation of a country against others that have already faced previous waves. By using our approach, we designed a transition index to estimate the most probable countries’ movements between infectious groups to predict next wave trends. …”
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    Country transition index based on hierarchical clustering to predict next COVID-19 waves
  4. 6584
    “…To counter the second COVID-19 wave in autumn 2020, the Italian government introduced a system of physical distancing measures organized in progressively restrictive tiers (coded as yellow, orange, and red) imposed on a regional basis according to real-time epidemiological risk assessments. …”
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    Impact of tiered restrictions on human activities and the epidemiology of the second wave of COVID-19 in Italy
  5. 6585
    “…BACKGROUND: Extracorporeal shock wave lithotripsy (ESWL) of kidney stones is losing ground to more expensive and invasive endoscopic treatments. …”
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    Can a Dinosaur Think? Implementation of Artificial Intelligence in Extracorporeal Shock Wave Lithotripsy
  6. 6586
    por Pelagatti, Matteo, Maranzano, Paolo
    Publicado 2021
    “…On 4 November 2020 the Italian government introduced a new policy to address the second wave of COVID-19. Based on a battery of indicators, the 21 administrative regions of Italy were assigned a risk level among yellow, orange, red, and, starting on 6 November 2020, different type of restrictions were applied accordingly. …”
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    Assessing the effectiveness of the Italian risk-zones policy during the second wave of COVID-19
  7. 6587
    “…Attractive mineralization between particles and bubbles by ultrasonic standing wave (USW) is a novel and high-efficiency method that could assist fine particle flotation. …”
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    Effect of the ultrasonic standing wave frequency on the attractive mineralization for fine coal particle flotation
  8. 6588
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    Correction: The first wave of COVID-19 in Malta; a national cross-sectional study
  9. 6589
    por Graczyk, Piotr, Krawczyk, Maciej
    Publicado 2021
    “…We present a new mechanism for manipulation of the spin-wave amplitude through the use of the dynamic charge-mediated magnetoelectric effect in ultrathin multilayers composed of dielectric thin-film capacitors separated by a ferromagnetic bilayer. …”
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    Nonresonant amplification of spin waves through interface magnetoelectric effect and spin-transfer torque
  10. 6590
    “…The thickness shear mode acoustic wave device is of interest for the sensing of biomarkers for diseases in various biological fluids, but suffers from the issue of non-specific adsorption of compounds other than those of interest to the electrode surface, thus affecting the device’s output. …”
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    Surface Adsorption of the Cancer Biomarker Lysophosphatidic Acid in Serum Studied by Acoustic Wave Biosensor
  11. 6591
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    New waves, new variants, old inequity: a continuing COVID-19 crisis
  12. 6592
    “…For inland waters, this roughness is primarily due to wind‐driven surface waves. The sensitivity of the coherent reflections to surface roughness can be leveraged to estimate wave height profiles across inland waters. …”
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    Towards Wind Vector and Wave Height Retrievals Over Inland Waters Using CYGNSS
  13. 6593
    “…The aim of this study is to describe the mortality among older adults in the first wave of COVID-19 in Colombia and Mexico. METHODS. …”
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    COVID-19 related mortality in older adults: analysis of the first wave in Colombia and Mexico
  14. 6594
    “…In this paper, the experimental platform of frequency-modulated continuous wave (FMCW) radar was built at first, realizing the noncontact measurement of vital signs. …”
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    Frequency-Modulated Continuous Wave Radar Respiratory Pattern Detection Technology Based on Multifeature
  15. 6595
    “…Emergent ventricular drainage for acute hydrocephalus improved the level of consciousness, but macrosquare-wave jerks (MSWJ) consisting of a right-ward intrusive saccade and corrective saccade appeared. …”
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    Macrosquare-wave Jerks Subsiding after Hydrocephalus Treatment in a Thalamic Hemorrhage Patient
  16. 6596
    “…In particular, we explored the nurses’ perception of job satisfaction in relation to the images sent back by public opinion through the mass media and social communication channels. During the first wave of Covid-19 nurses have acquired media visibility, but their feeling is represented more by the discomfort of finding themselves suddenly glorified in the face of a lack of professional, social, and economic recognition. …”
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    Perception of nurses’ professional identity during the first wave of Covid-19 pandemic infections.
  17. 6597
    por Atzendorf, Josefine, Gruber, Stefan
    Publicado 2021
    “…While existing studies mainly focus on the time during the first lockdown, we look at the weeks afterward in order to measure the medium-term consequences of the first wave of the pandemic. Using data from the SHARE Corona Survey, we include retired respondents aged 60 and above from 25 European countries plus Israel. …”
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    Depression and loneliness of older adults in Europe and Israel after the first wave of covid-19
  18. 6598
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    Did vaccine inequity lead to the second wave of COVID-19 infections in Trinidad and Tobago?
  19. 6599
    “…The concept of DI, if further tested and improved, might be used for non-invasive detection of ICP plateau waves.…”
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    Change in Blood Flow Velocity Pulse Waveform during Plateau Waves of Intracranial Pressure
  20. 6600
    “…This is likely to continue to fluctuate in line with subsequent waves. Significant efforts have to be made to enable trainees to meet educational and operative targets.…”
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    Riding the waves: the ongoing impact of COVID-19 on a national surgical training cohort
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