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...of unsatisfactory features. It showed up again in 1924 in the doctoral thesis of Louis de Broglie (1892-1987), who suggested that entities which are normally thought of as particles, such as electrons, actually have a wave-like aspect to their behaviour. Einstein, Bohr and de Broglie all received Nobel Prizes in recognition of their work. These early developments were strikingly out of step with ......

...de. Mae hwn yr un peth â 5 mililitr (ml). [Described image] Ffigur 26 Llwy de I fesur meintiau mwy, mae’n debyg y byddech yn defnyddio jwg mesur o ryw fath. Yn aml mae jygiau mesur wedi’u labelu â mililitrau, yn arbennig rhai newydd, a gallant ddod mewn meintiau gwahanol: gall rhai fesur hyd at 500 ml o hylif ac eraill hyd at 1 litr (1 000 ml). Gall rhai ddal mwy...

...de-skilling of the task in hand. For example, transferring a craftsperson’s skill into a computer program for operating a lathe allows a lower-skilled operator to produce a finished article to the same standard as the original craftsperson. And the development of a ‘script’ for use in a telephone call centre allows the de-skilling of people doing customer-facing...