RESUMO
We present measurements of Stark interference in the (61)S(0)â6(3)P(1) transition in (199)Hg, a process whereby a static electric field E mixes magnetic dipole and electric quadrupole couplings into an electric dipole transition, leading to E-linear energy shifts similar to those produced by a permanent atomic electric dipole moment (EDM). The measured interference amplitude, a(SI) = (a(M1) + a(E2)) = (5.8 ± 1.5) × 10(-9) (kV / cm)(-1), agrees with relativistic, many-body predictions and confirms that earlier central-field estimates are a factor of 10 too large. More importantly, this study validates the capability of the (199)Hg EDM search apparatus to resolve nontrivial, controlled, and sub-nHz Larmor frequency shifts with EDM-like characteristics.
RESUMO
We report the results of a new experimental search for a permanent electric dipole moment of 199Hg utilizing a stack of four vapor cells. We find d(199Hg)=(0.49+/-1.29_{stat}+/-0.76_{syst})x10;{-29} e cm, and interpret this as a new upper bound, |d(199Hg)|<3.1x10;{-29} e cm (95% C.L.). This result improves our previous 199Hg limit by a factor of 7, and can be used to set new constraints on CP violation in physics beyond the standard model.
RESUMO
The authors interviewed faculty members to determine their perceptions of what constitutes effective teaching in the ambulatory setting. They conducted semistructured interviews with experienced clinician-tutors who supervise residents in two internal medicine clinics. Tutors identified similarities as well as important differences between inpatient teaching and outpatient teaching. Questioning, role modeling, and emphasizing general principles and concept comprehension can be used effectively in both settings. On the other hand, the two settings differ strikingly in teaching of problem solving, bedside teaching, and provision of feedback. Many characteristics of the setting influence outpatient teaching, but the tutors offered differing viewpoints about whether these characteristics are beneficial or detrimental.
