N. Watson in 1918, but this analysis involved assumptions which, while perfectly valid for the long and medium waves then in use for radio communication, are not justifiable for the ultra-short ...

今天，中国科学院、国家航天局、中国载人航天工程办公室联合发布了我国首个国家空间科学规划《国家空间科学中长期发展规划（2024-2050年）》，提出了我国有望取得突破的5大科学主题和17个优先发展方向，描绘了至2027年、2028年至2035年、203 ...

The trick is to blow swirling air into the cavity at a specific speed and intensity, which allows the sound waves to ...

Heatwaves deep in oceans may be "significantly under-reported", highlighting an area of marine warming that has been largely ...

Bit by bit, the physicists have filled the gaps in the electromagnetic spectrum, which runs from X rays at the short end, through light and heat, to miles-long radio waves at the other.

[Photo/Xinhua] China unveiled its first-ever medium- and long-term plan for space science ... Additionally, in the next three ...

China unveiled on Tuesday its first-ever medium- and long-term plan for space science development, looking to establish ...

The human ear detects sound. Sound waves enter the ear canal and cause the eardrum to vibrate. Three small bones transmit these vibrations to the cochlea. This produces electrical signals which ...

China has unveiled a national space development program outlining key missions and research goals from 2024 to 2050. The ...