spontaneous coronary artery dissection is a rare cause of acute coronary syndrome and sudden cardiac death. we report coronary artery dissection in a 36-year-old woman with retrosternal chest pain 2 weeks after abortion. electrocardiography showed st elevation in leads v2-v4 and st depression in the inferior leads. lab data were normal. cardiac catheterization showed a suspicious thrombotic les...

two different dual phase steels were prepared from low carbon manganese steel after the eliminationof the banding using the direct quenching (dq) and the step quenching (sq) procedures. different heattreatments resulted in different martensite morphologies, microstructures and mechanical properties. theheat treatments were designed in such a way to obtain a 0.25 volume fraction of martensite (v...

The adapted alternating treatments design (AATD) is a single-case experimental (SCD) that allows for the comparison of two or more instructional procedures on acquisition non-reversible behaviors. Recent descriptions quality indicators and methodological practices (e.g., equating target sets) specific to AATD may help guide researchers clinicians interested in using this design, although additi...

Langenberg and Srinivasan (1981) proposed two procedures for the choice between two medical treatments. They assumed that there is a time lag between the administration of the treatments and the availability of the responses. The two procedures are suggested for dealing with patients who arrive during the waiting period, caused by the lag, between the trial and treatment stages of the model . T...