Luminescent solar concentratorA luminescent solar concentrator (LSC) is a device for concentrating radiation, solar radiation in particular, to produce electricity. Luminescent solar concentrators operate on the principle of collecting radiation over a large area, converting it by luminescence (specifically by fluorescence) and directing the generated radiation into a relatively small output target. Initial designs typically comprised parallel thin, flat layers of alternating luminescent and transparent materials, placed to gather incoming radiation on their (broader) faces and emit concentrated radiation around their (narrower) edges.
Pile boutonvignette|Différents types de piles boutons. Une pile bouton, ou pile de montre, est une petite pile électrique, généralement de forme cylindrique et de dimensions semblables à un bouton. Ces piles ont un diamètre de et une hauteur de . Non utilisées, elles se déchargent lentement. Elles sont principalement utilisées comme source d'énergie de petits appareils électroniques portables tels les montres, les calculatrices et les appareils auditifs. Elles ne doivent pas être confondues avec les piles au lithium, qui sont légèrement plus grosses.
PlesseyThe Plessey Company plc was a British electronics, defence and telecommunications company. It originated in 1917, growing and diversifying into electronics. It expanded after World War II by acquisition of companies and formed overseas companies. It was listed on the London Stock Exchange and was a constituent of the FTSE 100 Index. In 1989, it was taken over by a consortium formed by GEC and Siemens which split the assets of the Plessey group.
