No abstract

In this study, in order to improve the teaching effects in clinical medicine courses, multimedia teaching and traditional teaching were combined in operation programme in nursing major. One hundred and two undergraduates majoring in nursing were distributed randomly into two groups, i.e., the case group and the control group. The case group was administrated in traditional teaching method, while combined teaching method was applied to the case group. The results indicated that the combined teaching method being a useful and effective teaching method, was worthy of spreading.

In the rotation equation of the angle θ between the molecular axis and the laser polarization direction, the dependence of laser-induced polarizability on the molecular internuclear distance R is considered. The effect of the R dependence of laser-induced polarizability on molecular dynamic alignment in an intense femtosecond laser field is investigated with 20 and 100 fs laser pulses for N2 molecules and with 60 and 100 fs laser pulses for Br2 molecules at intensities of 5×1014 W cm−2 and 5×1015 W cm−2. This effect exists and only occurs during the dissociative process after the molecule is ionized. It enhances the degrees of molecular dynamic alignment and is more significant in reorienting the angular distributions of molecules towards the laser polarization direction in the conditions of high laser intensity and short pulse length. Compared with the N2 molecule, the effect of the R dependence of laser-induced polarizability on molecular dynamic alignment for Br2 is stronger. The reasons are presented and discussed.