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Saturday, 26 October 2019

Friday, 25 October 2019

Non-Stop (novel)

Non-Stop (novel).
Science Fantasy was a British fantasy and science fiction magazine, launched in 1950 by Nova Publications. John Carnell edited the magazine beginning with the third issue, typically running a long lead novelette along with several shorter stories. Prominent contributors in the 1950s included John Brunner, Ken Bulmer, and Brian Aldiss, whose first novel Nonstop appeared (in an early version) in the February 1956 issue. Fantasy stories began to appear more frequently during the latter half of the 1950s, and in the early 1960s Carnell began to publish Thomas Burnett Swann's well-received historical fantasies. In the early 1960s Carnell's efforts were rewarded with three consecutive Hugo nominations for best magazine. After Nova went out of business in early 1964, Roberts & Vinter took over as publishers until 1967. Kyril Bonfiglioli, the editor, attracted new writers, including Keith Roberts, Brian Stableford and Josephine Saxton. In the opinion of science fiction historian Mike Ashley, the final year of the magazine, when it was renamed Impulse, included some of the best material ever published in a British science fiction magazine.

Thursday, 24 October 2019

Distributed-element circuit

Distributed-element circuit.
Distributed-element circuits are electrical circuits composed of lengths of transmission lines or other distributed components. Used mostly at microwave frequencies, they perform the same functions as conventional circuits composed of passive components, such as capacitors, inductors, and transformers. They are made by patterning the conducting medium itself, rather than connecting pre-manufactured components with the medium. A major advantage is that they can be produced cheaply on printed circuit boards for consumer products, such as satellite television. They are also made in coaxial and waveguide formats for applications such as radar, satellite communication, and microwave links. Distributed element circuits were used in radar in World War II, and later in military, space, and broadcasting infrastructure. Improvements in materials science led to broader applications, and they can now be found in domestic products such as satellite dishes and mobile phones.

Wednesday, 23 October 2019

Russian battleship Retvizan

Russian battleship Retvizan.
Retvizan was a pre-dreadnought battleship built for the Imperial Russian Navy, launched on 23 October 1900. Named after a Swedish ship of the line that was captured during the battle of Vyborg Bay in 1790, Retvizan was transferred to the Far East in 1902. In the Russo-Japanese War, the ship was torpedoed during the Japanese attack on Port Arthur on the night of 8/9 February 1904 and grounded in the harbour entrance when she attempted to take refuge inside. She was refloated and repaired in time to join the rest of the 1st Pacific Squadron when they attempted to reach Vladivostok through the Japanese blockade on 10 August. The Japanese battle fleet engaged them again in the Battle of the Yellow Sea, forcing most of the Russian ships to return to Port Arthur. Retvizan was sunk there by Japanese howitzers in December, then raised and commissioned into the Imperial Japanese Navy as Hizen in 1908. After World War I she supported the Japanese intervention in the Russian Civil War.