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In the treatment of superficial lesions with 8-13 MeV electrons, lead shields are often used to protect the underlying tissue. Measurements were made with film and ion chamber to analyse various aspects of external and internal shielding in electron beam therapy. Data were obtained on the thickness of lead required for shielding, the effect of blocking on dose-rate, electron-backscattering from...

D oscillations, for which the B factories have found strong evidence, provide a new stage for our search for New Physics in heavy flavour dynamics. While the theoretical verdict on the observed values of xD and yD is ambiguous – they could be fully generated by SM dynamics, yet could contain also a sizable contribution from New Physics – such oscillations can enhance the observability of CP vio...

• Adult Support & Facilitation Full engagement in interaction, conversation, household work, reading, exploration, adventures, etc. Model appropriate thought, speech, and behavior, plus lessons from mistakes Acknowledge effort more than natural ability Clear boundaries between adult and child choices, decisions, space, etc. Consistent limits, rules, expectations with natural consequences when p...