8 may 1840 American engineer Alexander Walcott received the first ever camera-a daguerreotype. Unlike all cameras which were produced earlier, it was used a mirror instead of lenses to collect light on the photographic plate. Still images were made with the help of camera obscura where the image fell through a hole in the “box”, refracted through mirrors and “propeciacialis” on specially chemically treated sheets of paper.
Patent Alexander Walcote from 8 may 1840
In the same year was found a way to create a positive copy from a paper negative, and portrait photography “went to the people”, after which Walcott opened the world’s first photo Studio, which was very popular.
8 may 1903 was the first flight of the airship semi-rigid structures. The airship Lebaudy (“Lebedi”) successfully overcame the distance of 37 km, and its structure has begun production of large airships with metal frames.
The world’s first semi-rigid airship Lebaudy
Earlier in the transport and military purposes were used airships with soft design: the cloth case was also the cover for carrier gas with an overpressure. Because of this, the flight altitude of the airship depended on the weather, management was difficult, and the fire hazard was extremely high. In semi-rigid and rigid models of the metal shell has eliminated most of these shortcomings.
Even after 100 years of airships with semi-rigid design remain relevant: the German model Zeppelin NT is equipped with an internal frame, filled with helium and are used primarily for entertainment purposes.
8 may 2008 the Chairman of the Board of Directors of Microsoft bill gates has informed, that has sold 140 million copies of the operating system Windows Vista. He stated that it was “pretty fast paced”, and the company is happy with sales and growth forecasts of the market share of the system in the future.
Recall that Windows Vista went on sale on 30 November 2006 and with great difficulty gained popularity among users. The system was criticized for the slow and low stability on the computers of those years, which Microsoft was forced to launch an extensive program, under which customers license Vista could “roll back” to Windows XP.
The vast majority of copies of Vista were sold along with new computers and laptops, and the peak of popularity came in November 2009, when its market share was 14%. Since the introduction of the Windows 7 operating system downloads Vista has declined steadily, and in early 2012 Microsoft has discontinued the basic support for the long-suffering “OSes”.