High-pressure superconducting phase diagram of 6Li: isotope effects in dense lithium.

We measured the superconducting transition temperature of (6)Li between 16 and 26 GPa, and report the lightest system to exhibit superconductivity to date. The superconducting phase diagram of (6)Li is compared with that of (7)Li through simultaneous measurement in a diamond anvil cell (DAC). Below 21 GPa, Li exhibits a direct (the superconducting coefficient, α, T(c) proportional M(-α), is positive), but unusually large isotope effect, whereas between 21 and 26 GPa, lithium shows an inverse superconducting isotope effect.

High pressure melting of lithium.

The melting curve of lithium between ambient pressure and 64 GPa is measured by detection of an abrupt change in its electrical resistivity at melting and by visual observation. Here we have used a quasi-four-point resistance measurement in a diamond anvil cell and measured the resistance of lithium as it goes through melting. The resistivity near melting exhibits a well documented sharp increase which allowed us to pinpoint the melting transition from ambient pressure to 64 GPa.

Probabilistic index: an intuitive non-parametric approach to measuring the size of treatment effects.

Effect sizes (ES) tell the magnitude of the difference between treatments and, ideally, should tell clinicians how likely their patients will benefit from the treatment. Currently used ES are expressed in statistical rather than in clinically useful terms and may not give clinicians the appropriate information. We restrict our discussion to studies with two groups: one with n patients receiving a new treatment and the other with m patients receiving the usual or no treatment.

Cognitive therapy for persistent psychosis in schizophrenia: a case-controlled clinical trial.

The results of an open label controlled outcome study are presented, comparing Cognitive Therapy with a treatment-as-usual group. Independent raters assessed symptom severity and psychosocial functioning at baseline, and again at 6 months. Improvements were found for Cognitive Behavior Therapy (CBT) patients in Clinical Global Impression for Improvement (CGI; p<0.