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Results for “"Jun Yan Dai"”

16+ results

Wireless Communications With Reconfigurable Intelligent Surface: Path Loss Modeling and Experimental Measurement

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Wankai Tang, Ming Zheng Chen, Xiangyu Chen, Jun Yan Dai et al.

Journal: IEEE Transactions on Wireless CommunicationsYear: 2020Citations: 1587

Reconfigurable intelligent surfaces (RISs) comprised of tunable unit cells have recently drawn significant attention due to their superior capability in manipulating electromagnetic waves. In particular, RIS-assisted wireless communications have the great potential to achieve significant performance...

Physical SciencesEngineeringElectrical and Electronic EngineeringOpen Access
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Space-time-coding digital metasurfaces

Verified

Lei Zhang, Xiao Qing Chen, Shuo Liu, Qian Zhang et al.

Journal: Nature CommunicationsYear: 2018Citations: 1207

The recently proposed digital coding metasurfaces make it possible to control electromagnetic (EM) waves in real time, and allow the implementation of many different functionalities in a programmable way. However, current configurations are only space-encoded, and do not exploit the temporal dimensi...

Physical SciencesMaterials ScienceElectronic, Optical and Magnetic MaterialsOpen Access
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Geographical Variation in Total and Inorganic Arsenic Content of Polished (White) Rice

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Andrew A. Meharg, Paul N. Williams, Eureka Adomako, Youssef Y. Lawgali et al.

Journal: Environmental Science & TechnologyYear: 2009Citations: 772

An extensive data set of total arsenic analysis for 901 polished (white) grain samples, originating from 10 countries from 4 continents, was compiled. The samples represented the baseline (i.e., notspecifically collected from arsenic contaminated areas), and all were for market sale in major conurba...

Physical SciencesEnvironmental ScienceEnvironmental ChemistryOpen Access
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863 genomes reveal the origin and domestication of chicken

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Mingshan Wang, Mukesh Thakur, Min‐Sheng Peng, Yu Jiang et al.

Journal: Cell ResearchYear: 2020Citations: 293

Despite the substantial role that chickens have played in human societies across the world, both the geographic and temporal origins of their domestication remain controversial. To address this issue, we analyzed 863 genomes from a worldwide sampling of chickens and representatives of all four speci...

Life SciencesAgricultural and Biological SciencesAnimal Science and ZoologyOpen Access
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Programmable metasurface‐based RF chain‐free 8PSK wireless transmitter

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Wankai Tang, Jun Yan Dai, Mingzheng Chen, Xiang Li et al.

Journal: Electronics LettersYear: 2019Citations: 163

In this Letter, a wireless transmitter using the new architecture of programmable metasurface is presented. The proposed transmitter does not require any filter, nor wideband mixer or wideband power amplifier, thereby making it a promising hardware architecture for cost‐effective wireless communicat...

Physical SciencesEngineeringAerospace EngineeringOpen Access
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A universal metasurface antenna to manipulate all fundamental characteristics of electromagnetic waves

Verified

Geng‐Bo Wu, Jun Yan Dai, Kam Man Shum, Ka Fai Chan et al.

Journal: Nature CommunicationsYear: 2023Citations: 151

Metasurfaces have promising potential to revolutionize a variety of photonic and electronic device technologies. However, metasurfaces that can simultaneously and independently control all electromagnetics (EM) waves' properties, including amplitude, phase, frequency, polarization, and momentum, wit...

Physical SciencesMaterials ScienceElectronic, Optical and Magnetic MaterialsOpen Access
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High‐Efficiency Synthesizer for Spatial Waves Based on Space‐Time‐Coding Digital Metasurface

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Jun Yan Dai, Liu Yang, Jun Chen Ke, Ming Zheng Chen et al.

Journal: Laser & Photonics ReviewYear: 2020Citations: 128

Abstract Space‐time modulated metasurfaces enable efficient manipulations of nonlinear harmonics with more degrees of freedom than conventional materials by simply controlling the element geometries and modulation signals. The theoretical analyses reveal that a group of harmonics in reflected waves ...

Physical SciencesMaterials ScienceElectronic, Optical and Magnetic Materials
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Telehealth Demand Trends During the COVID-19 Pandemic in the Top 50 Most Affected Countries: Infodemiological Evaluation

Verified

Mark Yu Zheng Wong, Dinesh Visva Gunasekeran, Simon Nusinovici, Charumathi Sabanayagam et al.

Journal: JMIR Public Health and SurveillanceYear: 2020Citations: 124

BACKGROUND: The COVID-19 pandemic has led to urgent calls for the adoption of telehealth solutions. However, public interest and demand for telehealth during the pandemic remain unknown. OBJECTIVE: We used an infodemiological approach to estimate the worldwide demand for telehealth services during C...

Health SciencesMedicinePublic Health, Environmental and Occupational HealthOpen Access
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The role of dietary modification in the prevention and management of metabolic dysfunction-associated fatty liver disease: An international multidisciplinary expert consensus

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Xufen Zeng, Krista A Varady, Xiangdong Wang, Giovanni Targher et al.

Journal: MetabolismYear: 2024Citations: 107

Metabolic dysfunction-associated fatty liver disease (MAFLD) or metabolic dysfunction-associated steatotic liver disease (MASLD), has become the leading cause of chronic liver disease worldwide. Optimal dietary intervention strategies for MAFLD are not standardized. This study aimed to achieve conse...

Health SciencesMedicineEpidemiologyOpen Access
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A Norm-Taker or a Norm-Maker? Chinese aid in Southeast Asia

Verified

James Reilly

Journal: Journal of Contemporary ChinaYear: 2011Citations: 99

Abstract As China expands its development assistance in Southeast Asia, is Chinese aid beginning to emulate international norms and practices or sustaining its own distinct approach to development assistance? This essay argues that China's socialization into international norms varies with the thick...

Social SciencesDevelopmentInternational Development and Aid
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Effects of Fiber Additives on the Desiccation Crack Behavior of the Compacted Akaboku Soil as A Material for Landfill Cover Barrier

Verified

Tri Harianto, Shigenori Hayashi, Yan‐Jun Du, Daisuke Suetsugu

Journal: Water Air & Soil PollutionYear: 2008Citations: 98
Physical SciencesEngineeringCivil and Structural Engineering
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Frequency-modulated continuous waves controlled by space-time-coding metasurface with nonlinearly periodic phases

Verified

Jun Ke, Jun Yan Dai, Jun Wei Zhang, Zhanye Chen et al.

Journal: Light Science & ApplicationsYear: 2022Citations: 93

The rapid development of space-time-coding metasurfaces (STCMs) offers a new avenue to manipulate spatial electromagnetic beams, waveforms, and frequency spectra simultaneously with high efficiency. To date, most studies are primarily focused on harmonic generations and independent controls of finit...

Physical SciencesMaterials ScienceElectronic, Optical and Magnetic MaterialsOpen Access
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An international Delphi consensus statement on metabolic dysfunction-associated fatty liver disease and risk of chronic kidney disease

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Dan‐Qin Sun, Giovanni Targher, Christopher D. Byrne, David C. Wheeler et al.

Journal: HepatoBiliary Surgery and NutritionYear: 2023Citations: 87

Background: With the rising global prevalence of fatty liver disease related to metabolic dysfunction, the association of this common liver condition with chronic kidney disease (CKD) has become increasingly evident. In 2020, the more inclusive term metabolic dysfunction-associated fatty liver disea...

Health SciencesMedicineEpidemiologyOpen Access
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Roadmap on electromagnetic metamaterials and metasurfaces

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Tie Jun Cui, Shuang Zhang, Andrea Alù, Martin Wegener et al.

Journal: Journal of Physics PhotonicsYear: 2024Citations: 80

Artículo escrito por un elevado número de autores, solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboración, si le hubiere, y los autores pertenecientes a la UAM

Physical SciencesMaterials ScienceElectronic, Optical and Magnetic MaterialsOpen Access
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Prevalence, molecular characterization, and antibiotic susceptibility of Bacillus cereus isolated from dairy products in China

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Shengjuan Zhao, Junliang Chen, Peng Fei, Hongxia Feng et al.

Journal: Journal of Dairy ScienceYear: 2020Citations: 77

This study was conducted to reveal the prevalence, molecular characterization, and antibiotic susceptibility of Bacillus cereus isolated from dairy products including powdered infant formula, raw milk, pasteurized milk, ultra-high-temperature milk, and cheese. Five hundred samples collected from 5 p...

Life SciencesBiochemistry, Genetics and Molecular BiologyMolecular BiologyOpen Access
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