Results 11 to 20 of about 22,231,004 (383)

Toward Long-Distance Underwater Wireless Optical Communication Based on A High-Sensitivity Single Photon Avalanche Diode

IEEE Photonics Journal, 2020
In this study, we built a single photon avalanche diode (SPAD) receiver based underwater wireless optical communication (UWOC) system. The bit error rate (BER) and signal-to-noise ratio (SNR) performance of UWOC with different distances and data ...
Honglan Chen, Xinwei Chen, Jie Lu, Xiaoyan Liu, Jiarong Shi, Lirong Zheng, Ran Liu, Xiaolin Zhou, Pengfei Tian   +8 more
doaj   +1 more source

Trends and Predictors of COVID-19 Information Sources and Their Relationship With Knowledge and Beliefs Related to the Pandemic: Nationwide Cross-Sectional Study

JMIR Public Health and Surveillance, 2020
Background During the COVID-19 pandemic, there is a heightened need to understand health information seeking behaviors to address disparities in knowledge and beliefs about the crisis.
Shahmir H. Ali, J. Foreman, Y. Tozan, A. Capasso, Abbey M. Jones, R. DiClemente   +5 more
semanticscholar   +1 more source

Association Between Public Knowledge About COVID-19, Trust in Information Sources, and Adherence to Social Distancing: Cross-Sectional Survey

JMIR Public Health and Surveillance, 2020
Background The success of behavioral interventions and policies designed to reduce the impact of the COVID-19 pandemic depends on how well individuals are informed about both the consequences of infection and the steps that should be taken to reduce the ...
Ilona Fridman, Nicole Lucas, Debra Henke, C. Zigler   +3 more
semanticscholar   +1 more source

High-order mode interaction structure for a W-band CW sheet beam extended interaction klystron

AIP Advances, 2022
To solve the problem of mode competition in high-order working modes, this paper presents a fast design method based on the TM31-2π mode for the dumbbell shaped extended interaction cavity.
Qi Jin, Zhihui Geng, Rui Zhang, Bingchuan Xie, Shuzhong Wang, Yunfeng Liao, Xiudong Yang, Shouxi Xu   +7 more
doaj   +1 more source

COVID-19-Related Information Sources and the Relationship With Confidence in People Coping with COVID-19: Facebook Survey Study in Taiwan

Journal of Medical Internet Research, 2020
Background People obtain information on the coronavirus disease (COVID-19) from the internet and other sources. Understanding the factors related to such information sources aids health professionals in educating individuals.
Peng-Wei Wang, Wei-Hsin Lu, N. Ko, Yi-Lung Chen, Dian-Jeng Li, Yu-Ping Chang, C. Yen   +6 more
semanticscholar   +1 more source

Design study of a W-band high power extended interaction klystron based on the coaxial high-order mode

AIP Advances, 2021
In this paper, a W-band multi-beam extended interaction klystron operating in the coaxial high order mode (HOM) is proposed. The HOM coaxial cavity with large transverse dimensions is suitable for accommodating multiple electron beams, promising to ...
Xu Zhang, Rui Zhang, Yong Wang, Quangui Chao, Bingchuan Xie, Hao Chen, Naining Guo   +6 more
doaj   +1 more source

Vaccine acceptance among college students in South Carolina: Do information sources and trust in information make a difference?

medRxiv, 2020
Background: To control the COVID-19 pandemic, governments need to ensure a successful large-scale administration of COVID-19 vaccines when safe and efficacious vaccines become available.
S. Qiao, D. Friedman, C. Tam, C. Zeng, Xiaoming Li   +4 more
semanticscholar   +1 more source

Multi-beam gun design for an S-band klystron

AIP Advances, 2022
This paper introduces the detailed design scheme of a multi-beam electron gun applied to an S-band high power multi-beam klystron. The multi-beam gun adopts a coaxial cavity arrangement, and the total number of electron beams are 40 (19 in the inner ...
Xiaobo Lin, Rui Zhang, Quangui Chao, Bingchuan Xie, Zhihui Geng, Yunfeng Liao, Xiudong Yang   +6 more
doaj   +1 more source

Design and simulation of an S-band compact multi-beam klystron

AIP Advances, 2023
The miniaturization and high power of klystron are the main concerns of accelerators. Multi-beam klystron (MBK) can accommodate higher power and a lower operating voltage than single-beam klystrons, significantly reducing volume and weight.
Xiaobo Lin, Rui Zhang, Li Zuo, Quangui Chao, Bingchuan Xie, Zhicheng Wang, Zhihui Geng, Yunfeng Liao, Xiudong Yang   +8 more
doaj   +1 more source

The Topological Origin of Boundary Charges at Edges of One-Dimensional Crystals without Inversion Symmetry

Photonics, 2023
We report the edge states and non-zero boundary charges in one-dimensional photonic crystals (1D PhCs) without inversion symmetry. In contrast to common 1D systems, we show that edge states corresponding to non-zero boundary charges do exist in these ...
Pengdong Shi, Xingchao Qi, Yufu Liu, Xianjun Wang, Langlang Xiong, Xunya Jiang   +5 more
doaj   +1 more source