Συγγνώμη,αυτή η εγγραφή είναι διαθέσιμη μόνο στα Αγγλικά The rise of direct current using devices and direct current generation have some rethinking the use of alternating current in the grid. Read more: here   Image: Wikimedia Commons/Biho

Συγγνώμη,αυτή η εγγραφή είναι διαθέσιμη μόνο στα Αγγλικά HELIOSTAT (stand no. E-4) in the 4th Building Green expo 2011 2-5 December 2011, Anthousa EXPO Center.

Συγγνώμη,αυτή η εγγραφή είναι διαθέσιμη μόνο στα Αγγλικά The world’s smallest working “steam engine” has been built in Germany, according to a team of researchers. The microscopic model was based on a 195-year-old design by the inventor Robert Stirling. Changes included the replacement of the original pistons with a laser beam. The physicists said they […]