Nonadiabatic effects in electronic and nuclear dynamics.

Due to their very nature, ultrafast phenomena are often accompanied by the occurrence of nonadiabatic effects. From a theoretical perspective, the treatment of nonadiabatic processes makes it necessary to go beyond the (quasi) static picture provided by the time-independent Schrödinger equation within the Born-Oppenheimer approximation and to find ways to tackle instead the full time-dependent electronic and nuclear quantum problem. In this review, we give an overview of different nonadiabatic processes that manifest themselves in electronic and nuclear dynamics ranging from the nonadiabatic phenomena taking place during tunnel ionization of atoms in strong laser fields to the radiationless relaxation through conical intersections and the nonadiabatic coupling of vibrational modes and discuss the computational approaches that have been developed to describe such phenomena.

[NMR imaging in the diagnosis of orbital fractures with loss of function].

According to the results of this study NMR imaging seems to be the method of choice in radiodiagnosis of orbital wall fractures for demonstrating impactions or prolapses of orbital contents. It is superior to classic radiography or computerized tomography.

[Clinical use of an expert system for interpreting lung function tests--relation of results to the respective examiner].

We used a new expert system for interpretation of lung function tests to check the differences between four investigators. The data base of the program system consists of vectors which yield statistical informations concerning the decisions of the users.

[Diagnosis of postpartum complications using CT and MRT].

Severe puerperal infections, iliacal and ovarian vein thrombosis are post-partum complications which are potentially life-threatening. They require prompt medical treatment. CT and MR enable diagnosis by noninvasive methods.

[Pelvimetry using magnetic resonance tomography].

20 woman were examined before and after partum by means of conventional and magnetic resonance pelvimetry. Besides the usual data regarding the morphology and diameters of the pelvis, MRI gives information on the soft tissues of the birth canal without the added risk of irradiation to the mother and foetus. As shown by studies done in the USA it is also possible to determine foetal maturity by MRI; this will be done in the future.