Free-electron-driven beam-scanning terahertz radiation.

A beam-scanning terahertz (THz) radiation mechanism in a free-electron-driven grating system is proposed for THz applications. By loading a period-asynchronous rod array above the grating, the spoof surface plasmon (SSP) originally excited by the electron changes its radiation characteristics owing to the rod-induced Brillouin zone folding effect. The rod array functions as an antenna and converts the SSP into a spatial coherent THz radiation.

[Epidemiological analysis of malaria prevalence in Jiangsu Province in 2012].

Objective: To understand the malaria epidemic situation and characteristics in Jiangsu Province in 2012, so as to provide the evidence for formulating and adjusting effective malaria elimination strategies and measures.

Methods: The reported malaria cases from the Internet Reporting System and the epidemiological data of malaria in Jiangsu Province were collected and analyzed.

Results: A total of 198 malaria cases were reported in Jiangsu Province in 2012 with the incidence of 0.