Abstract: The instability of the sheet electron beam (SEB) is an essential factor for limiting the power of the SEB traveling wave tube (TWT). To solve this issue, this article proposes a method to ...

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WARSAW, POLAND — More than 180 migrants crossed into Poland through a tunnel hidden in a forest on the border with Belarus, frontier guards said on Friday. Around 130 of them were detained in Poland ...

Polish border guards have discovered another tunnel beneath the Poland-Belarus frontier, this time near the village of Narewka in the north-eastern Podlaskie region, which was reportedly used by ...

WARSAW, Dec 12 (Reuters) - More than 180 migrants crossed into Poland through a tunnel hidden in a forest on the border with Belarus, frontier guards said on Friday. Around 130 of them were detained ...

This summer, the University of Minnesota partnered with organic farmers on a project that helped boost the efficiency of crop growth and reduce pollution, according to the College of Food, Agriculture ...

Alberta has launched a three-year, $10-million Growing Greenhouses program to expand commercial greenhouses and vertical farms, with funding through the Sustainable Canadian Agricultural Partnership ...

China's high-speed rail program reached a milestone as the Yiliang Tunnel, the longest tunnel built for any 350 kilometers per hour rail line in the country, was bored through on Wednesday after more ...

Abstract: Wide-band wireless communication in tunnels and long corridors faces challenges due to multipath interferences and delay spread. Wall reflections induce dispersion, causing amplitude and ...

For farmers engaged in large-scale animal production, feed costs remain the most significant barrier to profitability. Across Kenya, poultry, fish, dairy, and pig farmers are struggling to cope with ...