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An aerial telescope is a type of very long focal length refracting telescope, built in the second half of the 17th century, that did not use a tube. [1] Instead, the objective was mounted on a pole, tree, tower, building or other structure on a swivel ball-joint.
Film on working of antenna. In radio engineering, an antenna (American English) or aerial (British English) is an electronic device that converts an alternating electric current into radio waves, or radio waves into an electric current.
The $54 million contract was signed for 12 (plus 3 for spare parts and 1 simulator) howitzers, including modernization and upgrade of said howitzers including support equipment, spare parts and training simulator. With deliveries starting in 2015 the deliveries were completed by 2019. Future additional purchase of the system is very likely to ...
Aerial survey 1930 Map of flights by Frank Neale, including those for the Mackay aerial exploration of Central and Western Australia. Beginning in 1930, Mackay supervised several aerial survey expeditions to Central Australia. The 1930 expedition surveyed the south-western corner of the Northern Territory.
27 March 2023: First prototype of the TB3 has been made public. [5]13 October 2023: Successful completion of TB3's first test run. [6]20 October 2023: Conducted the initial take-off and landing test, achieving high speeds and briefly took the wheels off from the ground, without fully flying into the sky.
Transpiration is the process of water movement through a plant and its evaporation from aerial parts, such as leaves, stems and flowers. It is a passive process that requires no energy expense by the plant. [ 1 ]
By the end of 10 May, the official German figures indicate claims for 30 Belgian aircraft destroyed on the ground, and 14 (plus the two RAF bombers) in the air for 10 losses. [60] The victory claims are likely an undercount. A total of 83 Belgian machines–mostly trainers and "squadron hacks", were destroyed. [58]
Patch antenna gain pattern. A directional antenna or beam antenna is an antenna which radiates or receives greater radio wave power in specific directions. Directional antennas can radiate radio waves in beams, when greater concentration of radiation in a certain direction is desired, or in receiving antennas receive radio waves from one specific direction only.
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