What static and dynamic properties should slalom skis possess? Judgements by advanced and expert skiers.

Flexural and torsional rigidity are important properties of skis. However, the flexural and torsional rigidity that lead to optimal performance remain to be established. In the present study, four pairs of slalom skis that differed in flexural and torsional rigidity were tested by advanced and expert skiers.

[Tracheo-bronchial fissures from external trauma in children. Apropos of 3 cases].

The authors report three cases of tears in the tracheal or bronchial membrane in children resulting from an accidental external trauma of the trachea. Those children ranged from 3, to 5 and 10 years old. Those lesions showed a clinical gaseous syndrome associated with mediastinal and subcutaneous emphysema, in one of these cases complicated by unilateral pneumothorax and pneumomediastinum.

[Current diagnostic criteria for intracranial epidermoid and dermoid cysts].

The authors report a recent series of 12 intra-cranial epidermoid and dermoid cysts. After they had reminded the main classical radiological and clinical signs which are rarely specific, they study C.T.