The anisotropic four-wave mixing in the scheme recently proposed by S.I. Stepanov and M.P. Petrov (Opt. Commun. vol.53, p.64-8, 1985) is studied. The main feature of this interaction arrangement is ...

With the continuous progress and development in biomedicine, metallic biomedical materials have attracted significant attention from researchers. Due to the low compatibility of traditional metal ...

Brother Jo Johnson is also a Conservative politician. Johnson was the fourth prime minister to study at Balliol College. The other three were H.H. Asquith, Edward Heath, and Harold Macmillan ...

Frankenstein and Dracula launched the careers of two struggling middle-aged foreign actors – Hungarian stage actor Bela Lugosi and Anglo-Indian Boris Karloff.. Lugosi was fond of mentioning his ...

(Photo by Anatolii STEPANOV / AFP) Ukraine’s Finance Minister Serhiy Marchenko will ask the Verkhovna Rada, Ukraine’s parliament, to review this year’s spending in the light of the larger defensive ...

Artist Emma Meehan putting the final touches on the Boris Johnson waxwork AFP via Getty Images When approached for comment by the newspaper, Downing Street said the decision was a “matter for ...

REUTERS/Anatolii Stepanov Newton and Walder expect drone technology to continue to evolve, making them smaller and allowing them to fly at lower elevations and with lower heat emissions. Such ...

Ukraine has incurred a sovereign credit default after electing not to make payments owed Monday to holders of $2.6 billion of its debt securities. Ukraine’s Finance Ministry said last week the ...